Digerati,
Thank you very much for replying as I am getting more desperate.
In Safe mode, all the behaviors are the same.
- Logitech K520 keyboard/ M705 mouse work on associated usb wireless transmitter and Logitech M510 mouse works on any USB slot on my computer.
- Other USB mice and keyboards wired and wireless do not work, including Logitech wired USB keyboard and brand new Best Buy usb wireless blackweb keyboard.
Mysterious to me, in regular mode and Safe mode, all USB thumb drives work in all usb slots. Indeed, the USB mice that do not work have their lights turn on and off when plugged in and pulled out of the slots. I think this means that the non-wireless Logitech drivers are being blocked or are corrupted (even though I have reinstalled them many times.)
Can you or anyone confirm to me that this behavior conclusively demonstrates that the Asus motherboard is not responsible, especially since all mice and keyboards work in UEFI bios mode?
As a related question, if it is not the motherboard, this means the problem is Windows 8.1. When Windows 10 is installed, does anyone know how this installation affects Device Manager devices and settings, and could it automatically solve this problem.
I noticed this problem when my Gigibyte Aivia usb wired keyboard stopped working, and I recall no other concurrent problem or install/uninstall at the time. Since then, using SFC/scannow, I have disovered problems with two Windows Updates (KB3022345 and KB3068708), but since uninstalling them, SFC gives clean bill of health.
I am contemplating two steps: Uninstall the Logitech drivers (but if Windows will not automatically reinstall, then I am locked out). Deleting the “upperfilters” and the “lowerfilters” in the registry for the mice and keyboard. I have rolling clones of my OS drive, so I think -- but am not sure -- that would work if I get locked out. Do either of these seem like good ideas?
Again, thanks very much for any assistance you or anyone can provide. For many reasons, I badly need to avoid a clean install, but I will not bother anyone with those troubles.
Bill
PS. BTW, Dism /Online /Cleanup-Image /RestoreHealth and chkdsk/f both are ok. When I use the Windows CD with “automatic repair”, I get the diagnose message, a short “repairing” message, then a normal reboot, but with no change on this problem.