PC was working fine yesterday, today when I booted it up, it is asking me for a username and password, and whatever I put in it says the domain"name of my pc" is not available. I can get into safemode without a problem. I'm running xp pro at home, no domain or anything. I tried changing the pc name, making sure it is just in a workgroup, no change. Still asks for username and password then tells me the domain is not available. I ran AVG and Spycatcher, nothing. I ran control userpasswords2 and made sure the "users must log in with username and password" wasn't checked. What the hell?