I accidently deleted my username on the PC for admin and now I can't open the C:/ drive. It's my computer and I'm the only one who uses it. I thought it was a virus at first when I tried to download an anti-virus security software and it wont let me download anything. I tried system restore even in safety mode. Won't work. While looking around in places I shouldn't have, I saw 5 different user names and thought that was my sister so I deleted 4 of them. Even though I am in Admin right now, it wont let me even view My Documents or My pictures, and the whole C drive. Help!!!