I was trying to get my SIXAXIS working with my PC and I was installing the filter driver (libusb-win32-filter-bin 0.1.12.1.exe). As soon as it hit 100%, I heard the error sound and my comp froze. After waiting a few minutes, I restarted it. Vista loaded up to the password screen and neither the keyboard nor the mouse (both USB) were working. I restarted again and tried to boot in safe mode. I hit f8 and the computer beeped but the menu never opened. The only thing that I could get to is the system set-up and I was able to scroll around. So it works before Windows loads. I tried to boot from the Vista disk but it doesn't seem to be able to do that either. I thought I'd just grab an old PS/2 keyboard and mouse but my comp doesn't have PS/2 ports.
I'm really at a loss for what to do. I've given you most of the info that I can think of. If you need any other info just tell me and I'll get it.