Couple of quick questions: - Was the original Windows 10 system, that started having trouble, a system that was upgraded from a previous version of Windows? - If so, what version? I had this trouble on a system that was upgraded from Windows 10 to Windows 11 with printer and audio interface drivers. The manufacturers indicated that the driver was compatible with Windows 7, 8, 10 and 11, but on my Windows 11 system, they were not fully functional, even though they installed without issue. I had the same drivers running on another system running Windows 7, and they were running as expected. I got the drivers to install and run successfully on my Windows 11 system by simply invoking the setup programs in Windows 7 compatibility mode. You do that by selecting the setup program and right-clicking to bring up the context menu and select properties. There should be a compatibility tab with a drop-down list where you can set the executable context to run under Windows 7 compatibility mode. You might want to try that and see if it works.