What is your primary machine operating system?
For further analysis, could you please run dxdiag.exe on your primary machine, click “Save All Information”, then attach the output file (dxdiag.txt) on your next reply.
Thanks for sending the dxdiag info.
Please make sure that any pending Windows update are installed on your machine.
It’s possible that QWave feature on your machine cannot be started or got corrupted due to missing system updates (KBXXXX).
qWave (Quality Windows Audio Video Experience) feature must be installed in your Windows 7 machine.
There are some cases that it’s already installed, but corrupted or maybe your machine is missing some Windows updates.
Please also check if KB2533623 and/or KB3063858 Windows 7 update are installed on that machine.
If not, please download this KB updates from Microsoft and try again with spacedesk installation.