There isn't one, unless you are on a WINDOWS XP Home edition computer that has an unsecured administrator password. In this case, you would have to have started the computer in safe mode. Then, your "secret bypass" is CTRL ALT DEL, to bypass the welcome screen. This allows you to manually type in Administrator or another username into the logon screen Vs. having to select an account. Useful for hidden accounts or an administrative account that is not typically shown on the Welcome Screen.
Again, you can only logon as administrator in XP home if you are in safe mode. Also, the password, for any account, if set, cannot be overridden, so simply hope that it is left blank.
Best of luck.
the logon screen appears
Ctrl + Alt + Del
Key combination [Windows+L] locks Windows XP.
No. Nor are they offered with a key bypass. You will have to cut it off if you have lost the combination.
Key combination [Windows+L] locks Windows XP.
ALT TAB or WINDOWS KEY TAB
display the desktop
The key combination to lock the computer in Windows XP is the Windows Logo Key + L. It sounds like one of the two Windows Logo keys might be stuck down.
bypass key on a trooper
The Local Security Authority or LSA is a key component of the logon process in both Windows NT and Windows 2000. In Windows 2000, the LSA is responsible for validating users for both local and remote logons. The LSA also maintains the local security policy. During the local (interactive) logon to a machine, a person enters their name and password to the logon dialog. This information is passed to the LSA, which then calls the appropriate authentication package. The password is sent in a nonreversible secret key format using a one-way hash function. The LSA then queries the SAM database for the user's account information. If the key provided matches the one in the SAM, the SAM returns the users SID and the SIDs of any groups the user belongs to. The LSA then uses these SIDs to generate the security access token. If you find the info useful please vote!!!
Restart your computer and start pressing the F8 key on your keyboard. You need to press F8 before the Windows logo appears. If the Windows logo appears, you need to try again by waiting until the Windows logon prompt appears, and then shutting down and restarting your computer. Note: On a computer that is configured for booting to multiple operating systems, you can press the F8 key when the Boot Menu appears
When you hold down the shift key down during start-up after your account name and password have been entered, Windows bypasses execution of shortcuts in the Startup menu. You must hold the shift key while pressing enter, and continue to hold it until logon is complete.Other things, such as logon scripts, policies, registry run queues, etc. still run.