Re: Reformatted Computer
Windows has hundreds of hidden accounts, in which you cannot access from the XP logon screen, but can via classic logon. These include admins, domain names, power users, guests, there's actually quite a few!
Most you can't delete, but can remove from log on screens, so don't worry! Dependant on whether the disc was OEM or not, some install the guest account, and prompt it to be shown on the log on screen.