Some background info: I installed a new video card (HD5770) for a system that has not been used since April 2009. The install went smoothly with no real issues. Due to the long period of non-use, I cleaned the system up by uninstalling about 10+ programs then rebooting. Most of those uninstalled programs were games, but I did uninstall Quicktime, Adobe Flash Player, NVIDIA display drivers, and Logitech G15 GamePanel Software. Upon reboot, I no longer had either mouse or keyboard support in Windows (Normal). I am using a PS2 keyboard and a USB mouse (although I have also tried a PS2 mouse). I am able to still use the keyboard at POST to enter Windows Boot Menu and then Safe Mode but have no keyboard or mouse support in Safe Mode. As such, I am unable to troubleshoot the issue within Windows. Please help!
Try resetting bios to default. Is usb enabled in bios?
If you can browse the bios with the keyboard, recovery console should also work....
And I think your best bet would be the Recovery Console (set Cd to boot first from bios ,press r when Win CD loads)
You could try a manual restore point within System restore at the cmd ( a bit tricky, see here: http://forums.whatthetech.com/index.php?showtopic=10581...), or try replacing files from the Windows\Repair to System32\Config.....(make backup copies of what you're replacing)
It could also be a chipset driver problem for some models.
Excuse the delayed response (obviously I have had computer issues), but thank you very much for your help. Via the NVIDIA forum thread you linked. I was able to fix my locked keyboard/mouse problem following coffeejolts' (#18) advice.