Note: There is a hidden 'Administrator' account (the account name is:
Administrator) in Windows.
The default password for this hidden account is normally blank (none).
For XP Home users:
Boot the computer into Safe Mode
Do this by pressing the F8 key after the Power On Self Test is finished,
until the Start menu appears.
This will get you to the correct menu window.
Once in Safe Mode, you will see the normally hidden Administrator account
and any other accounts.
(Note: Accounts are displayed alphabetically).
Use the Up/down arrow keys to highlight the 'Administrator' account;
Remember as mentioned above: The default password is a blank (no password
Also See: Forgotten your Windows XP Home password
For XP Pro users:
You do not need to go into Safe Mode.
At the Welcome Screen, do/press the Ctrl-Alt-Del keys twice to display the
Windows logon box.
Type in "Administrator" (without the quotes) and 'if' you assigned a
password when you set up Windows, then enter it. (Note: by default the
password is blank, no password need be entered)
Once your in, then:
Click Start/Run/and type in: Control Userpasswords2 and then press OK
Next click on the Advanced tab and then click Manage Passwords.
Also see: How to log on to Windows XP if you forget your password or if your
(This Microsoft article applies to both XP Home and Pro)