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Re: Keyboard input disabled after update

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We had the same issue.  Replaced a corrupted CEAPI.DAT file and soon after, some keyboards (and some trackpads) stopped functioning as described above.

In each case, it was clear there was a spyware infection that was getting 'fixed', and in turn breaking the internal keyboard...

In our case, I was able to trace the issue to an infection detected by the Win32.Trojan.Agent definition and found in vulscan logs that it 'fixed'  2 reg keys that looked related to keyboard functionality:

HKLM\SYSTEM\CurrentControlSet\services\kbdclass

HKLM\SYSTEM\CurrentControlSet003\services\kbdclass

 

I compared the entries on the broken system to a working laptop of the same model.  I also compared the seemingly unaffected CurrentControlSet001/002 on the broken system.

I recreated the kbdclass and sub keys (Enum/Parameters) for both affected CurrentControlSet keys.  Reboot, and it the keyboard worked again!  No system restore needed.


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