I thought I would upgrade one of my computers to Windows XP Professional, so I sat down yesterday and did so. However, the "Welcome" screen wants a password the program didn't ask for. I can't get to a dos prompt to read the password file or to try to re-install. I can't get in as an administrator. Does anyone know how to either get to the dos prompt from the Welcome screen or how to get around this little problem? I am completely locked out of this computer at present.