Administrator account lost.

[yuencoming]

my window 7 admin account has been suddenly changed to guest account and i face error when i try to change back to admin acc. it says access is denied. i've done some searching in internet and find out that it occurs after i changed the setting in 'control userpasswords2', i unchecked the box writing "user must enter a username and password to use this computer".
kindly helpppp, people who know how to solve this! thanksss

[tangomouse]

try system restore! to before you made any modifications

Restart computer ,Start tapping F8 to bring up Advanced boot options
Select Repair computer and run system restore from there!!

also in there is cmd prompt ,u can turn on the hidden admin account

from cmd prompt type" net user administrator /active:yes" without quotes

when u reboot the hidden admin account should be visible

[solin]

Try to look here:

http://support.microsoft.com/fixit/

http://support.microsoft.com/mats/Malware_Prevention/

or Download this http://fixitcenter.support.microsoft.com/Portal/GetStarted

[Raymond]

Unchecking "user must enter a username and password to use this computer" in User Accounts shouldn't downgrade your admin account to Guest.

[Bluedot]

Hi yuencoming. You should first boot through an antivirus rescue disk to check if you have any malware infection and to remove the infection (if any). If you still can't boot into your admin account, try booting your PC from a certain rescue disk called Kon-Boot. It's Windows 7 compatible and it literally breaks into your system and lets you regain admin privileges in Windows and correct the mistake that you have previously made.

P.S. Using Kon-Boot in others' computers without their permission is ILLEGAL and I'll not be responsible if you get into trouble. Happy tweaking.