I have a second computer (desktop, pentium four Windows XP pro)thats been running fine until just a few hours ago. The computer froze up and shut down when i was checking my facebook. When i rebooted my computer it started asking for a password. And i've never set one, and i live alone. So i tried getting into command prompt, but i can't boot my computer any which way without this password. I have a lot of important documents saved on my computer so reformatting is not an option since i'll lose a lot of money and my job. Anyone know how i can regain access to my computer? I've never seen a computer do this before, so i have no idea whats going on.