[Fixed] USB keyboard & mouse not working on windows startup
Just today we faced problem with our computer which is Dell Optiplex 3020. after a RAM upgrade keyboard & mouse stopped responding as soon computer reached windows logon screen. numlock & mouse led was lit but not responding, i tried below mentioned solutions.
1. added old RAM as it was running with earlier.
2. Reset BIOS by removing CMOS battery.
3. Updated bios to latest version.
4. Swapped USB ports.None of the above methods worked. but one thing i noticed keyboard & mouse are working perfect in bios setup. so the thing clicked in my mind there is something wrong with the drivers that is why its not responding after windows is loaded.
so what i did,
i made windows live USB using WINtoUSB tool. it creates portable windows drive which can be used to boot from USB on the computer having problem.
once you are inside windows browse to your original windows installation drive
in this folder delete these 3 files:
and restarted the computer, and it worked fine, this method may work with any computer until unless its hardware (USB,Keyboard) not damaged.
another solution you can try is windows repairing using windows 7 DVD, i read on some blogs it also works for some people.