Run the spacedesk Driver Installer
For Windows 10:
spacedesk_driver_Win_10_32_v109_BETA.msi for 32-bit platform
spacedesk_driver_Win_10_64_v109_BETA.msi for 64-bit platform
For Windows 8.1:
spacedesk_driver_Win_8.1_32_v102_BETA.msi for 32-bit platform
spacedesk_driver_Win_8.1_64_v102_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.