When I start the computer, I can go into setup and see that the the USB Keyboard and Mouse are recognized as installed (and the keyboard works to get in). I can use the keyboard to choose which drive to boot from and whether to boot windows normally or into Safe Mode. But once the Windows splash screen appears, the keyboard and mouse are disabled. I can't do anything.
I can boot from a system disk and go into Recovery mode and log into Windows, but I can't launch system restore from there.
What's happening with this computer and what do I do to save it?