One of my customers has a Win7 Pro machine that has recently become physically untouchable. This is because both the mouse and keyboard hardware device configs are porked in the registry. The two interface devices are entirely unresponsive - even when booting in safe mode.
It is not a hardware issue, as no replacement mouse or keybd make a difference. Also, hitting F8 and starting a system repair will allow the existing mouse & keybd to work just fine while selecting a System Restore point. Speaking of which, I have picked one as far as 3 months ago - the results are still the same.
The only way I can access this machine is via RDP. Everything else looks good except for the Code 19s in the Device Manager.
Uninstalled the devices, scanned for new hardware, pointed to new drivers, etc - no dice.
After doing some Google searching, I tried looking for Upperfilters or Lowerfilters in the associated device GUIDs in the registry. They were not there.
My first though on this was malware - so I ran complete scans with Kaspersky, Malwarebytes and few other tools. They all came up clean.
Anyone seen something like this before?