I bought an old Toshiba from craigslist which was set up with Windows 7 Ultimate and an administrator account. I didn't want to bother logging in anymore, so after some Googling, I unchecked "Users must enter a user name and password to use this computer" in the User Accounts window (you access it by entering "control userpasswords2" in the Run menu).
Now when the machine starts up, I am asked to log in, but the username and password do not work. I tried entering in blank values, I tried entering in a blank password, and I tried restarting in safe mode, but I get the same results.
I don't have password recovery media, and I am pretty sure the key on the bottom of this computer is older than Windows 7, so I can't just reinstall it.
Can anyone point me in the right direction?