From one day to the other, my laptop with win7 stopped reacting to any input from mouse or keyboard. Its starts normally without errors, but at the startscreen it doesn't let me do anything. Wierd thing is that the fingerprint sensor still works. I checked the BIOS, USB is enabled and in the BIOS menu the keyboard works just fine. I also started with a linux live cd to check the partition for errors, everything seems to be ok. Google also didn't help me so far.
Any ideas what the reason for this may be and what i could do to repair it. I mean, I could just load a backup, but first I want to know what exactly went wrong(got me cuious

Thanks, Dahaar
PS: I don't have a Windows 7 Repair Disc atm and I don't really want to get one just for this.