The program is not listed in the windows installed app , and in uninstall section of the control pannel. There dont seem to be an .msi file of the spacedesk app. And manualy deleting its file wont work because it’s says need system permission
What is your spacedesk Driver version?
How did you attempt to uninstall it? (via control panel, etc.) and did you encounter any error during uninstall?
Which files are still present that you are trying to delete?
Could you please try to install again the driver using the latest spacedesk Driver v1.0.73 from http://www.spacedesk.net/ and from there, try to uninstall it the regular way using .msi installer (Remove) or control panel (Uninstall)