I think Windows switched my logon password

[nonxcarbonx]

I use disk encryption, so I figured that with that, I wouldn't need a logon password on startup. I tried disabling it by going into run, then running "Control userpasswords2" and unchecking the "Users must enter a user name and password to use this computer." which I read to do on a forum. Now I only have one account on the computer, the admin one. It looked a bit weird when I did this though, since the options screen I disabled it in looked like something out of xp (and no, I don't think it's malware. I run MSE every day and this involved no downloaded software or executables)

So anyways, I restart the computer, and as windows opens that blue welcome screen, before I ever even type a character, I get an incorrect password message. When I get the logon screen, I type in my admin password several times, and get an incorrect password.

Does anyone know what happened?

 

[Ijack]

Have you tried booting in Safe Mode? If you can, log on as Administrator and undo the change that you made.