Hi @orange-figure.
Could you please check if there are pending Windows updates in your system settings (or your current update may be lacking some important packages.) If there is, please try to update them and try again with spacedesk.
If that didn’t solve your problem, please provide us with the following files:
– run dxdiag.exe on your primary machine, click “Save all information” and send us the output file
– spacedeskSetup.log file located in C:\Users\Public
– setupapi.dev.log file located in C:\Windows\INF
Please save all requested files in one folder, then right-click -> Send to -> Compressed (zipped) folder, then attach the *.zip file in your next reply.