Usually I can fix just about anything on my own, but this issue has left me completely dumbfounded. I am running Windows 8.1 Pro. Here are the symptoms:
Thanks in advance.
- For a while, a lot of the time I turned on my computer, a random key would be held down. Usually this was the number 7 or the control key. It would keep this key held until I rebooted, often multiple times.
- Now, I have to reboot my computer multiple times (quite a few, up to 20 times) to get the keyboard to work at all. It will not take input at all. Not even the on-screen keyboard will work. It just freezes when I click a key on it. This goes for all keyboards. If I continue to mash keys, it will eventually type one or two characters but that's it. The fact that this applies to all keyboard, including the on-screen keyboard, makes me firmly believe there is something larger at play than drivers or something.
- Keyboards work fine in safe mode, and in other operating systems (loading up live linux CDs etc). They also work fine in the BIOS.
- I have tried multiple keyboard drivers (and keyboards), to no avail.
- I have tried uninstalling / re-installing all usb devices / hubs in device manager, to no avail.
- I have scrutinized the system event log and remedied all errors. My system event log is error-free.
- I have ran a chkdsk, no errors.
- I have run an sfc /scannow, no errors or corruption found.
- I have tried the keyboard on multiple USB ports, including ones on an additional PCI-E card.
- I have tried disabling all startup items and all non-Microsoft services.
- I have tried disabling unnecessary Microsoft services.
- I have checked that filter keys is disabled.
Thanks in advance.