Use iMac As Monitor For PC {Window / Laptop} Need to follow the Steps

Primary Windows Machine (network display server)

The spacedesk server runs a Windows service and the WDDM Display Driver which is visible to Windows just as additional virtual display monitors on the primary video card (Windows 8.1) or on an own separate virtual graphics adapter (Windows 10). These additional virtual displays can mirror the main screen or extend the Windows Desktop. spacedesk DRIVER software is capturing their screen content, compressing it and transmitting it over the LAN (Local Area Network) to the spacedesk VIEWERs.

• Windows 10 (version 1607 – later only) / 8.1
• Graphics adapter Nvidia / AMD / Intel / Basic Display
• WDDM 2.6 / 2.5 / 2.4 / 2.3 / 2.2 / 2.1 / 2.0 / 1.3 / 1.2 / 1.1
• DirectX 12/11/10/9

Secondary Machine or Device (network display client)

Android VIEWER on tablets and phones.

iOS VIEWER on iPhones, iPads and iPod touch

Windows VIEWER on Windows PCs, laptops and Surface.

• Windows 10 / 8.1 / 7
• DirectX 10
• DirectX WARP (Min. 800 MHz CPU / Min. 512MB RAM)

HTML5 VIEWER on any device running operating system with HTML5 Web browsers

Chrome (> 16), Safari (> 5.1) Internet Explorer (> 10), Opera (> 27) e.g.:

• Windows Phones (Windows Phone 10 / 8.1)
• Windows Surface, tablet, laptop and PC (Windows 10, 8.1, 8, 7, Vista, XP)
• Mac (OSX)
• Linux PC and laptop

Before installing a new spacedesk version, uninstall any previous version. This can be done on Windows Control Panel → Programs and Features.

For Windows 10:

spacedesk_driver_Win_10_32_v0964_BETA.msi for 32-bit platform
spacedesk_driver_Win_10_64_v0964_BETA.msi for 64-bit platform

For Windows 8.1:

spacedesk_driver_Win_8.1_32_v0943_BETA.msi for 32-bit platform
spacedesk_driver_Win_8.1_64_v0943_BETA.msi for 64-bit platform

Make sure to check the Firewall configuration before proceeding otherwise no client will be able to discover this Primary Machine nor connect to it.

Only on Windows 8.1 the dialogs below will be shown and need to be confirmed. These operating systems, also require a reboot after the setup has completed.

First, make sure that the spacedesk Driver is properly installed and can be seen underneath Programs and Features.

Check if the spacedesk System Tray icon (at the bottom right of the screen) is visible in the notification area and click it to show spacedesk status ON and if the spacedeskService is running.

Check the Windows Firewall settings if spacedeskService.exe is allowed on private or public network. Open Control Panel → Windows Firewall → Allow an app through Windows Firewall, allow an another app then browse for spacedeskService.exe located at “C:\Windows\System32” folder.

Check spacedesk version by clicking the spacedesk System Tray icon (at the bottom right of the screen) to show the spacedesk SERVER interface displaying the current version.

Then compare this version with the website’s current spacedesk version.

Android VIEWER is installed from the Google Play Store and iOS VIEWER is installed from the iTunes App Store.

A Windows PC, laptop or Surface tablet can be used as Secondary Machine. spacedesk Windows VIEWER needs to be downloaded from the

spacedesk website. It needs setup and installation as shown below.

Run the spacedeskWindowsVIEWER setup installer, spacedeskWindowsVIEWER_v0922_BETA.msi. After a successful installation of Windows VIEWER application a shortcut is created on the desktop.

For spacedesk HTML5 VIEWER, no setup installation is needed on the Secondary Machine. HTML5 VIEWER operates with a standard web browser without any setup needed upfront. It can be opened directly from the website http://spacedesk.ph/html5viewer/. Make sure that the web browser (e.g. Safari, Google Chrome, Opera, Internet Explorer, etc.) is updated to the latest version.

It is important to understand, that spacedesk HTML5 VIEWER does not operate over the internet. It does not need an internet connection. It does not even need to be opened over the internet as described above. The HTML5 page can be saved locally.

Local install (optional):The web page can be saved to be used off-line even without internet connection. Follow the instructions below:

• Refresh using Ctrl-F5 keys after opening HTML5 page (this ensures that everything is updated).
• For Google Chrome browser, use the the menu “More tools ” and select “Create shortcut… “.
• For Microsoft Internet Explorer browser, use the the menu “Tools ” and select “Add site to apps “

spacedesk secondary machines (except HTML5 VIEWER) can do automatic network discovery of Primary Machines.

Only when using HTML5 VIEWER or in case the Primary Machine cannot be discovered, the IP address of the Primary Machine needs to be entered manually. It can be determined in various ways:

• Click the spacedesk System Tray icon (at the bottom right of the screen) OR the spacedesk SERVER icon on the Windows Start menu to display the spacedesk SERVER user interface.

• Typing ipconfig in a Windows command prompt.

Android / iOS / Windows Viewer
On the client side, initiate connection to server by opening the spacedesk VIEWER app and select the desired server on the list of detected primary machines to automatically connect. If Primary Machine cannot discover, please check the chapter Troubleshooting Network Connection – Cannot Detect Primary Machine below.

HTML5 Viewer
Using the updated web browser, go to HTML5 viewer page then type the IP address of primary machine where the spacedesk DRIVER is installed. The “Need Help?” button below the Connect button provides an instructions on how to get the IP address of server machine and then click the “Connect” button to start the connection.

On the Primary Machine side, check if the connection is established. Just click the spacedesk System Tray icon (at the bottom right of the screen) on the primary machine to display the spacedesk SERVER user interface, then the number of successfully established connections can be seen and the attached device/machine in the Network Connections (remote) tab.

Open Display Control Panel via spacedesk SERVER user interface menu button then click Display Settings …, then check if there’s a secondary display attached.

Right Mouse Click on Desktop → context menu “Display settings” leads to Display Control Panel. Display Control Panel can be used to change display resolutions and to verify proper operation. During Desktop Extension the following status should be shown:

During Desktop Duplication (Mirror) the following status should be shown:

During Single Output (Second Screen Only) the following status should be shown:

Display Switch (Windows logo + P) can also be used to change modes

Disabling the spacedesk server temporarily to prevent other spacedesk client connection can be done via spacedesk SERVER user interface menu → OFF.

Below a few configuration settings to adjust spacedesk operation to individual needs.

The “Mouse, Keyboard and Touchscreen ” option on Windows VIEWER → Functionality menu will enable the remote control feature of spacedesk. Users can now use the mouse, keyboard remote control from the client machine. To exit from remote control mode just press “Alt+Shift” key combination.

For enabling touchscreen, two options are available absolute and relative mode.Touchscreen (absolute) mode provides an absolute input position of the mouse pointer within your viewer screen.
Touchpad/Trackpad (relative) mode is using relative desktop coordinates.

On Android VIEWER, touch screen feature is also supported. It is enabled by default on Settings → Touchscreen → Enable Touch Screen Control option.

There are two different options on how touch feature can work on Android and iOS device.

• Absolute touch provides an absolute input position of the mouse pointer.
• Relative touch which works like a touch pad.

On HTML5 VIEWER, just go to Advanced Performance Settings → Remote Control to enable remote control feature. However, no keyboard control only mouse and touchscreen support.

Below are the touch gestures for Android and HTML5 Viewer:

Move pointer: Tap with one finger and drag anywhere on the screen.

Left-click: Tap the screen with one finger

Right-click: Tap and hold the screen, then release.

Drag Windows/Object: Tap two times for relative OR tap once for absolute, hold then drag.

The “Resolutions” dialog box of the Windows VIEWER Settings allows the users to use up to two resolutions. The client’s native resolution can be enable and use by checking the box of “Native Screen Resolutions”.Then the user can also add another resolution by selecting one of the typical screen resolutions on the combo box.

The “Automatic Connect” option of the Windows and Android viewer’s Settings allows the user to enable the automatic connect to IP address (of multiple primary machines) or hostname upon launching the viewer app and also an option to “Auto-reconnect” to the last server machine connected in case of sudden disconnection from system sleep or hibernate or from any kind of unwanted disconnection.

The “Full screen upon Connect” option on Windows VIEWER Settings will enable the automatic switching to full screen mode upon connecting to the server.

The “Keep Monitor Active” option on Windows VIEWER Settings will prevent the secondary machine’s monitor from going to Display Off or System Sleep only when Windows VIEWER is connected to the server.

The “Auto rotation” option on iOS and Android viewer settings allows users to enable an automatic rotation of viewer screen according to current display orientation (eg Portrait or Landscape mode) of iOS / Android device.

To set the spacedesk Windows VIEWER app to auto start during Windows start up:

• open the run command (Window + R key combination),
• paste “% appdata% \ Microsoft \ Windows \ Start Menu \ Programs \ Startup” then enter,
• on the Startup folder just copy the spacedesk Windows VIEWER shortcut file found on your desktop.

Step 1: Open Videowall Engine User Interface by clicking the “Video Wall Configuration” in the menu button of the spacedesk SERVER window.
A user access control prompt will appear to run the graphical user interface as administrator, just click yes.

Step 2: Enable/Disable Videowall functionality using the toggle switch in the header part of the window.

The left panel shows the tree view of the client displays connected and disconnected.
The root item is the primary machine’s computer name.
The sub items shows the Video Walls created and the client displays currently connected and disconnected.

The right panel shows the main setting/options:
Disconnect Delay – allows the user to set a disconnect delay timer in seconds. If the value is set to -1, the display will remain plugged in the primary machine even after client device disconnection. It will only unplug if video wall switched to OFF or after reboot.
By default, it is set to zero and display will immediately unplug upon client device disconnection.
Clear Settings – clears all the sub items in the left panel.
Export Registry Settings – allows the user to export the video wall registry settings as *.reg file which can be restored in case the settings was cleared/deleted.

Updating the wall display’s settings will take effect immediately upon pressing the enter on each text box.
Dimension – The (Width x Length) screen resolution of the video wall. By default, Video wall display is set to 4K screen resolution (3840 x 2160).

Updating the client display’s settings will take effect immediately upon pressing the enter on each text box.
Wall Index – use to create new Video Wall or assign to an existing Video Wall.
Dimension – The (Width x Length) screen resolution of the client display.
Below is the the (X : Y) position/coordinates of the client display. By default, both are set to 0.
This settings is only applied on the client displays assigned in a Wall.
Rotation Angle – Angle in degrees of the client display. By default, it is set to 0.
This settings is only applied on the client displays assigned in a Wall.
SubSampling type – The color depth type of the client display image. By default, it is set to 4:2:0.
For more info please check Color Depth and Image Compression chapter.
Contrast – slider settings to adjust the client display image’s contrast. By default, it is set to 0.
Brightness – slider settings to adjust the client display image’s brightness. By default, it is set to 0.
Compression Quality – slider settings to adjust the client display image’s quality. By default, it is set to 70.

Step 1: Create a Video Wall Display

For first time client connection, the display is set as Extension mode.
To create a Video Wall, just assign a value (e.g. 0) in the Wall Index text box of each client display.
Just press the enter key to update the settings and it will automatically plugged a video wall display (e.g. Wall0).

Step 2: Assign multiple clients to Video Wall

Multiple client display can be assigned to the video wall by assigning it on the Wall Index text box or via right click context menu “Assign to WallX”.
User can also create multiple video walls simultaneously as long as the primary machine’s resources can handle it.

Step 3: Creative Video Wall

Creative video wall involves rotated client displays and/or positioned in a non zero X and Y coordinates.
Below are the sample creative video wall settings.

Sample #1: Video Wall0

Sample #2: Video Wall1

Step 4: Mirroring to multiple client displays

This video wall configuration can also be used to mirror/duplicate a desktop screen into multiple client displays, by assigning multiple clients in one video wall with the same X and Ycoordinate and just change the video wall’s dimension to the same dimension of the client displays.

spacedesk currently has two known BSOD (Blue Screen of Death) issues which cannot be solved because they are caused by faulty third party Antivirus software. Avast Antivirus software seem to have faulty filter driver software which crashes the Windows 10 PC with BSOD (Blue Screen of Death) when spacedesk is present:
Avast’s network filter driver (aswArPot.sys) has a USB Tethering bug doing network transfers over RNDIS. The BSOD usually happens while spacedesk is connected.

Desktop duplication of primary monitor to other displays is disabled in Windows display settings of Windows 10 with old version of graphics adapter (< WDDM 2.0). Just download the latest driver version from its website OR if it did not work try to downgrade the graphics driver to Microsoft Basic Display driver via device manager.

Latest spacedesk Windows 10 Driver version now only supports Windows 10 version 1607 and above. Just run “winver ” to check Windows 10 version. If the version is older than version 1607 (Build 14393) just upgrade to Windows 10 version 1607 or above, in order to use the latest spacedesk driver. Use Windows 10 Update Assistant to upgrade Windows 10 to latest version for free, just click here…

Multi-GPU Technology such as Nvidia SLI Technology or AMD Crossfire is currently not supported by spacedesk. In case SLI is enabled, spacedesk will not work properly.
Virtual machines are officially not supported by spacedesk driver for Windows 8.1 Primary Machine. It may work on some cases but some problems may occur such as strange mouse pointer behavior, black screen on client, etc.
Nvidia Control Panel crash may also observed while spacedesk is active on Windows 8.1 Primary Machine.
qWave (Quality Windows Audio/Video Experience) Windows Feature unavailablemessage box during installation may observed on Windows Server 2008/2012 primary machine. To install this feature, Open Server Manager -> Add Roles and Features, just click Next until you are on the Features, then check if the box for Quality Windows Audio Video Experience (qWave) features is checked, and if not please check it and install.Then restart your server machine (if required).

In very rare Windows 8.1 environments a BSOD crash (Blue Screen of Death) can happen upon connect. Such a system crash is always recoverable because the driver is not yet active during Windows 8.1 system boot time.
Just reboot the primary machine in safemode then uninstall the spacedesk driver. To boot in safemode, press and hold f8 key upon computer reboot and before the windows logo appeared. Then in advanced boot option screen use the arrow keys to select the safe mode option then press Enter key.

Note: Before uninstalling using the spacedesk msi installer on safemode, run a Command Prompt then type the following commands:
Step 1:
for Safemode: REG ADD “HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot\Minimal\MSIServer” /VE /T REG_SZ /F /D “Service”
for Safemode with Network: REG ADD “HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot\Network\MSIServer” /VE /T REG_SZ /F /D “Service”

Step 2: net start msiserver

Nvidia ShadowPlay – Current spacedesk version has a known issue with Nvidia ShadowPlay. While Nvidia ShadowPlay (screen record) is active, spacedesk will give an error code 1-2-0 on the viewer side. Just disable it in order to use spacedesk.
Night Light – Windows Night Light settings is currently not supported on spacedesk displays.

Step 1: Different Network Segments

If Primary Machine and Secondary Machine are in different network segments, then they cannot discover each other. However, they may still be able to connect. In that case try to add the IP address to detect the primary machine by clicking the ” + ” button.

To get the IP address of the Primary machine please check the above chapter Establishing the network connection .

Step 2: third party firewall software

In case the above steps did not help, then a third party firewall software (other than Windows Firewall) could still prevent detection. Please check this chapter’s paragraph ” Firewall Settings ” below.

Step 3: WiFi router’s network isolation active

In case all above steps still did not help, and if this is happening on a wireless network, then there might be one other remaining problem: WiFi router’s network isolation feature might be activated. The only solution for this is re-configuring the router.

Step 4: VPN (Virtual Private Network) enabled

Just refer to the VPN topic below.

Step 5: Alternative ways to connect

If all above connection attempts failed. Try USB Tethering or Wifi Direct / Hotspot setup to establish a network connection between Primary and Secondary machines.

This shows that the primary machine can be reached over the network but connection fails after the indicated connection time. Possible reasons are the following:

– Unstable network connection
– Error on spacedesk Primary Machine
– Nvidia ShadowPlay (screen record) is running which is a known issue at the moment.
– Virtual Private Network (VPN) enabled

Third party firewall

If there is a third-party firewall software or anti virus (eg Avast, AVG, etc.) with own firewall settings running on Primary Machine, then this can prevent spacedesk discovery and connection.

Please ensure that C: \ Windows \ System32 \ spacedeskService.exe is allowed through the firewall software or the spacedesk TCP / IP network protocol port is opened. spacedesk is using TCP port 28252.

Windows firewall

Please ensure that the Windows Firewall settings is correct. For details please check chapter Setup Primary Machine – Verify if setup was successful .

On some situations, having a VPN connection present on either primary or secondary machine prevents the network discovery process between spacedesk server and client, which results to “Cannot Detect Primary Machine” or “Error code 1-0” in spacedesk viewer apps.
There are various workaround that can fix this problem without completely disabling the VPN connection.
1. If VPN app has user interface with configuration settings that will let users select a specific apps to not use VPN, just add the C:\Windows\System32\spacedeskService.exe on this exception list.
2. Run “ncpa.cpl”, right-click the Ethernet or WiFi network icon then open the Properties window. Click on the Sharing tab and check the “Allow other network users to connect through this computer’s internet connection” box.

Check if spacedeskService is operating. Make sure that spacedesk service has started and spacedesk System Tray icon (at the bottom right of the screen) is visible in taskbar’s notification area and turned ON. For details, please check chapter above Setup Primary Machine – Verify if Setup was Successful .

Server OFF or ERROR

spacedesk server can be enabled and disabled via spacedesk server user interface menu. In case viewer app cannot discover / connect to the server, make sure that this menu is ON.
spacedesk server can be in ERROR state if spacedesk Graphics Adapter in device manager has yellow exclamation mark which indicates an error in driver. Check in C: \ Windows \ system32 \ drivers \ UMDF directory if “spacedeskDisplayUmode1_x.dll” is present then try to disable-enable the driver in device manager and try to switch ON in spacedesk server user interface menu.

For Windows 8.1 primary machine, check for “spacedeskHookKmode.sys” in C: \ Windows \ system32 \ drivers directory, then reboot.

For Windows 10 (version 1607 – later) primary machine, open Device manager and check below Display Adapters if spacedesk Graphics Adapter is installed correctly and enabled.

Step 1:Check if system tray bubble reports incompatible display hook driver

This error message indicates that another WDDM filter hook display driver is present on the system.

Step 2:Uninstall known products using incompatible display hook drivers

This is usually installed by a USB-Display or Zero-Client of the following brands:

Display Link, Duet Display, Fresco Logic, MCT, Microchip/SMSC, OSBase, Splashtop XDisplay and Extended Display HD, etc.

Display hook drivers are not standard Windows drivers. All products relying on such drivers are incompatible with each other. They cannot coexist on the same system. This includes spacedesk.

Uninstall the other product / hook driver detected, then reboot the spacedesk server machine and try to connect spacedesk client again.

Step 3:Check if incompatible products did not uninstall OSBase driver

Various products using the OSBase driver do not properly remove it upon uninstall (e.g Duet Display, Fresco Logic, etc.). After uninstalling their product, the leftovers of the OSBase driver still need to be removed manually following the instructions below:

• Go to Control Panel -> “Add Remove Programs “. If you can find OSBase display driver software, uninstall it.
• Check if OSBASE drivers are installed by running the following commands:
  • “sc query ddkmd “
  • “sc query ddkmdldr “
  • “sc query ddmgr”
• If installed, uninstall OSBASE drivers by running the following commands:
  • “sc stop ddmgr”
  • “sc delete ddmgr”
  • “sc delete ddkmdldr”
  • “sc delete ddkmd”
• Reboot your PC.

Installation repair can be done by running the same msi installer version then select Repair button. Or just go to Windows Control panel → Programs and Features then search for spacedesk Driver, right-click then repair. This procedure only applies for Windows 10 primary machine only.

Detached Second Display.

In case of gray or black screen in Windows desktop application or always connecting status on HTML5 VIEWER or “Display OFF” message showing in Android/iOS VIEWER, click the spacedesk Server window on the task bar and check if status of the device on Network Connections (remote) tab is “detached” then open the windows display settings of the server machine. Just select “Display Settings” in spacedesk Server window menu button then try to attach it by selecting extend or duplicate.

Mirror mode failed.

For Windows 8.1 primary machine, if desktop extension is working but duplication is always failing, make sure that the “Settings → Resolutions → Other Screen Resolution” of Windows VIEWER OR the “Advanced Performance Options → Custom Resolution” of HTML5 VIEWER OR the “Settings → Resolution” of Android VIEWER, OR Settings → Display → Custom Resolutions of iOS VIEWER should matched the native resolution of the primary machine’s monitor.

For Windows 10, if duplicate option is not available in Display settings try to update the graphics adapter by Windows Update or manual download of driver from official website.

If duplication is still not available after driver update, then it’s probably because the driver does not support mirror mode anymore. Please refer to Known issues chapter below for Mirror mode not supported.

Clear All Display Settings.

In case display is in wrong settings (orientation, screen resolution, display detached) upon client connect, try the “Clear All display Settings” option in spacedesk System Tray menu.

Make sure that the VIEWER version is updated. To check just open the Settings → About of Android / iOS / Windows viewer app. While in HTML5 Viewer page, current version is displayed on the page below. Then compare the version on the viewer to the current version on the spacedesk website.

Step 1: Delete cached files, images and cookies of web browser.

If spacedesk HTML5 VIEWER web page doesn’t load the latest version 0.9.10, just delete the cached files, images and cookies on browsers settings.

Step 2: check if the web browser supports websockets.

If the spacedesk HTML5 VIEWER is unable to connect, check the version of the web browser and make sure that it is updated. If the secondary machine is a smartphone or tablet device the browser and OS needs to be most recent versions supporting websockets. Just go to https://websocketstest.com/ to verify.

Error Code: 1 & Error Info: 0

This error code and info indicates that the viewer cannot find the Windows server on the network. Mostly, this is caused by Virtual Private Network (VPN) enabled on the primary machine. For more details, kindly refer to the Troubleshooting Network connection – Connection Error chapter above.

Error Code: 1-2-3 & Error Info: 0-3-5

This error indicates that the primary machine can be reached over the network but connection fails after the indicated connection time. Check the Connection Error chapter discussed above.

(android) (iOS)

These error message box also shows the connected time, it indicates how long the viewer is connected before it disconnects. And in case procedures did not help, just report this error code sequence to spacedesk support.

Custom Screen Resolutions

On iOS and Android viewer, custom screen resolutions available on settings are only those not bigger than the device’s native screen resolution. This is due to the black screen problem observed when switching to higher resolution. On Windows and HTML5 viewer’s Settings → Resolutions… → Other/Custom Screen Resolutions, supported resolutions is up to 4096×2160.

Performance in HTML5 VIEWER

HTML5 VIEWER is much slower than native viewer apps on Android, iOS and Windows. This is due to technical limitation of HTML5/Javascript.

Slow screen update on Windows VIEWER.

There are some cases that the rendering of screen update in Windows VIEWER is very slow. One of the possible reason is that Windows client machine only has a DirectX 9 graphics driver. It is recommended to upgrade to DirectX 10 – above graphics driver to achieve better performance.

Multiple Display

As of now, spacedesk supports simultaneous connection of up to sixteen additional displays.
– Up to sixteen Android, or iOS, or Windows VIEWERs
– One HTML5 VIEWER web browser application for any device and operating system e.g. Mac OS X and Linux

HTML5 VIEWER on Mozilla Firefox and Microsoft Edge not supported.

spacedesk’s HTML5 VIEWER is currently not supported in Mozilla Firefox web browsers due to performance limitations. Please use other web browsers recommended in system requirements chapter.

The network router is the heaviest performance restraint. Cirumventing routers substantially improves performance. This can be done in various ways:
– On wired networks, just use crossover cables.
– On wireless networks use WiFi Direct (see paragraph below).
– USB Tethering (see paragraph below) has about the same performance as WiFi Direct.

Performance on wireless networks can be improved by configuring the Windows 10 PC/laptop or the mobile device as Wifi Hotspot / Wifi Access Point. Connection to this Access Point needs to be established before connecting spacedesk.

To configure the Mobile Hotspot option on Windows 10 PC/laptop. Just go to Start → Settings → Network & Internet → Mobile Hotspot, then turn it ON. Try to connect the client device(phone/tablet/laptop) to the wireless network name generated by the Mobile Hotspot. Then run the spacedesk VIEWER and connect to the IP address of server machine, in this case it should be the IP address of the Mobile Hotspot network generated (Microsoft Wi-Fi Direct Virtual Adapter).

If the secondary machine is a smartphone or tablet that supports USB tethering, use the USB cable to establish a network connection between primary and secondary machine. USB tethering typically supported on devices with Cellular Network.

For Android device just go to settings and find the Tethering & portable hotspot, then connect the USB cable of Android device to Windows primary machine, then enable the USB tethering in Android settings.

For iOS device, make sure to turn OFF first the Wifi. Connect the iOS device to Windows primary machine via USB lightning cable. Then switch ON the Cellular Data and Personal Hotspot and an option will pop-up and select USB Only.

The faster the network, the faster the display performance. Cable networks tend to have better performance than wireless networks. The fastest option is always a direct connection via network cable, e.g. a Gigabit Ethernet.

Currently minimum reasonable network bandwidth needed by spacedesk BETA ranges around 50 Mbit/sec. Substantial improvements including support of slower networks are planned for the first release version.

The lower the resolution of the networked display screen, the faster the display performance.

spacedesk uses image compression to improve display performance. This mechanism reduces image size before transferring images over the network. The spacedesk image compression algorithm is lossy. It reduces quality and color depth of the image.
On fast networks, color depth and image quality can be kept very high while still achieving good performance.
On slow networks, color depth and image quality need to be reduced to achieve good performance.

The “Compression Quality” dialog box of the Windows VIEWER Settings allows the user to enable or disable the compression of screen updates. To choose OFF means to use RGBA 32-bit color format of screen image and no image quality reduction will be done. To choose On means that the user allows to reduce color depth by Chroma Downsampling and adjusts the compression quality to find the ideal image quality and performance speed.

YUV 4:4:4 – No reduction of color information. High quality of screen image but, performance intensive. Can only be used on very fast networks

YUV 4:2:2 – Reducing the color information by 1/3 (from 24 bit to 16bit) reducing color quality of screen image and improving performance.

YUV 4:2:0 – Reducing the color information by 50% (from 24 bit to 12bit) to achieve best possible performance.

The color loss caused by the above mechanism typically not very much noticeable for the human eye, especially when there is a lot of motion on the screen (e.g. playing a video). Thus YUV: 4:2:0 is the default setting which can apply to many user Applications.

The Image Quality can be varied between 100 (no compression) and 0 (maximum possible compression). The default value is 70 which still tends to show a clear enough and detailed enough image for many user applications.

The framerate option allows user to choose the FPS (framerate per second) on the viewer screen.
On Windows viewer just go to Settings → Compression Quality … → Frame rate per second (FPS).
On Android viewer, just go to Settings → Quality / Performance → Custom FPS rate.
On iOS viewer, just go to Settings → Quality → Custom FPS rate

Uninstall of spacedesk can be done on Control Panel → Programs and Features.

An alternative way to uninstall spacedesk is using the spacedesk msi installer file.

Step 1: Run the setup installer

Run the spacedesk setup installer.

spacedesk_driver_Win_10_32_v0964_BETA.msi for x86 platform
spacedesk_driver_Win_10_64_v0964_BETA.msi for x64 platform

Step 2: Click the remove button

After selecting the Remove button, just click Next until it uninstallation completed.

Starting on version 0.9.9.z.25, reboot is not needed anymore in Windows 10 machine.

Step 3: Reboot (Windows 8.1 only)

After the uninstallation has completed, reboot the computer before proceeding with any other task.

Note: Please do not manually delete or remove the C:\Program Files\datronicsoft\ spacedesk folder and its files, to prevent uninstallation problem.

Step 1: Missing spacedesk program files.

Manually deleting spacedesk program files located in chosen directory folder (e.g. C:\Program Files\datronicsoft\spacedesk) is extremely not advisable, doing so may result to uninstallation failure of spacedesk with an error message below.

To fix the problem, just restore the program files (please check your Recycle bin)to its original location and try to uninstall again using the same msi installer version or by Windows Control Panel → Programs and features.

Step 2:Try Microsoft Fix.

If uninstall problem still persist after restoring spacedesk program files, try the Install/Uninstall troubleshooter program from the Microsoft Fix article. If spacedesk is not on the program list, just select “Not Listed” then paste the product code of current spacedesk version below.
spacedesk_driver_Win_10_32_v0964_BETA.msi:{493B1B25-1B2D-4CDC-99A2-086A959441C3}
spacedesk_driver_Win_10_64_v0964_BETA.msi:{89592275-79DA-423A-91E1-8706EC312DF4}
spacedesk_driver_Win_8.1_32_v0943_BETA.msi:{8ADAE518-D63C-42BC-A8A3-B87677D53CA4}
spacedesk_driver_Win_8.1_64_v0943_BETA.msi:{460A34C6-BDDD-4A93-849D-EA6464F8FE81}

spacedeskWindowsVIEWER_v0925_BETA.msi:{F60C1103-FBF9-4584-9FC2-42718AAA6CBD}

for previous spacedesk version:
spacedesk_driver_Win_10_32_v0963_BETA.msi:{17284B14-1298-45AB-9CD1-9A91DA7B730B}
spacedesk_driver_Win_10_64_v0963_BETA.msi:{14892EB2-EA17-4F68-8D07-417BB9BF2B43}
spacedesk_driver_Win_10_32_v0961_BETA.msi:{29119D95-695A-4EF7-A71E-2923DBF941E8}
spacedesk_driver_Win_10_64_v0961_BETA.msi:{226EFB44-2785-47DA-B444-E6BFEB4E2172}
spacedesk_driver_Win_10_32_v0959_BETA.msi:{9E1DA4D3-540D-4CCF-8668-4F7407BE7A43}
spacedesk_driver_Win_10_64_v0959_BETA.msi:{92D15DFD-F215-4BAC-B4C3-EE1D164B5661}
spacedesk_driver_Win_10_32_v0958_BETA.msi:{80039C05-6033-4656-AAD5-EBF743D9E795}
spacedesk_driver_Win_10_64_v0958_BETA.msi:{30E4F208-31A0-486E-9703-A69F0E2E9E1D}
spacedesk_driver_Win_10_32_v0957_BETA.msi:{CA98491B-9B81-4D2D-81DC-9F9B0789D296}
spacedesk_driver_Win_10_64_v0957_BETA.msi:{1BDD3F4B-AFDD-433F-9803-22D6C0D331F4}

spacedesk_driver_Win_8.1_32_v0942_BETA.msi:{A7D39D1F-F9A5-40FA-A44C-66542202C3F4}
spacedesk_driver_Win_8.1_64_v0942_BETA.msi:{B6B1B36B-36B3-4AF7-98E2-C26F1F451481}

spacedeskWindowsVIEWER_v0922_BETA.msi:{E9CA928E-27FF-4E6C-B509-803A84A0221E}

spacedeskWindowsVIEWER_v0921_BETA.msi:{5B8E3B1F-0199-4EDF-8841-84947B36674E}

Step 3: Manual uninstall of drivers and services

After successfully troubleshooting uninstall, spacedesk should be removed from “Programs and Features”. To make sure that drivers and services are comprehensively removed, all the steps in the next section “Manual uninstall” need to be executed.

The steps in this chapter should only be done in exceptional cases if needed and if previously discussed with spacedesk support. The regular way to uninstall spacedesk is using Windows Control Panel or the spacedesk msi installer file as described above.

Step 1: Uninstall services

Run a Command Prompt (cmd.exe) “as administrator” and enter the following commands below:

• sc delete spacedeskHookKmode (for Windows 8.1 only)
• sc stop spacedeskService
• sc delete spacedeskService

Step 2: Uninstall spacedesk Graphics Adapter (for Windows 10 only)

For Windows 10 operating systems, manually uninstall spacedesk Graphics Adapter in Device Manager.This only applies on spacedesk driver version 0.9.9.z.25 – later.

Step 3: Uninstall spacedesk Mouse and Keyboard drivers (for Windows 8.1 only)

Manually uninstall the spacedesk Mouse and Keyboard driver on Device Manager.

Step 4: Uninstall spacedesk virtual HID Device (for Windows 10 only)

On device manager click View -> Devices by Connection, then find the spacedesk virtual HID Device.
Before uninstalling the spacedesk virtual HID Device, the children below should be uninstall first.
Just right-click each child devices underneath the spacedesk virtual HID Device, then click “Uninstall device”.

Step 5:Reboot

Reboot the system and ensure that the following registry keys below have been removed:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\spacedeskService
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\spacedeskKtmInputKeybd
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\spacedeskKtmInputMouse

For Windows 8.1
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\spacedeskHookKmode

For Windows 10
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WindowsNT\CurrentVersion\WUDF\Services\spacedeskDisplayUmode

Step 6:Delete files

Delete all files listed in the appendix of this document underneath “File list” in the Appendix of this document.

Uninstallation of Windows VIEWER on Secondary Machine can be done on Control Panel → Programs and Features. Another way to uninstall is by using the msi installer.

Note: If these troubleshooting procedures does not solve your problem please contact our spacedesk support, just click here.

spacedesk Windows 10 Driver version 0.9.64
Bug fix for disconnect bug on some machines.

spacedesk Windows Viewer version 0.9.25
Bug fix for screen tearing.

This only applies on Windows 8.1 Primary Machine.

Applications conflicting and causing system instability while spacedesk is active

Skype for business
Fortinet security software
Flight Simulator

Applications not working in full screen mode on spacedesk display monitor

Various DirectX games (e.g. Witcher 2, Project Cars, Asseto Corsa, Battlefield, etc.)

File list (Windows 10)

Windows\System32\drivers\UMDF\spacedeskDriverHid.dll
Windows\System32\drivers\UMDF\spacedeskDisplayUmode1_0.dll (for Windows 10 version 1607 – 1703)
Windows\System32\drivers\UMDF\spacedeskDisplayUmode1_2.dll (for Windows 10 version 1709 – above)
Windows\System32\drivers\spacedeskKtmInputMouse.sys
Windows\System32\spacedeskService.exe
Windows\System32\spacedeskKtm.dll
Windows\System32\spacedeskSrvLibConnectorUsb.dll
Windows\System32\spacedeskServiceTray.exe

File list (Windows 8.1)

Windows \ System32 \ drivers \ spacedeskHookKmode.sys
Windows \ System32 \ drivers \ spacedeskKtmInputMouse.sys
Windows \ System32 \ drivers \ spacedeskKtmInputKeybd.sys
Windows \ System32 \ spacedeskHookUmode.dll
Windows \ System32 \ spacedeskService.exe
Windows \ System32 \ spacedeskKtm.dll
Windows \ System32 \ spacedeskSrvLibConnectorUsb.dll
Windows \ System32 \ spacedeskServiceTray.exe

Files on 64 bit systems only

Windows \ SysWOW64 \ spacedeskHookUmode.dll

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