How to log on to Windows XP computer if you forgot the administrator password?
Can't remember Windows XP administrator password? Is there a way to recover lost Windows XP password? Many times we cannot get into Windows because of forgetting the administrator password, and may have to reinstall Windows XP and all other programs that were installed on the computer before you can use the computer again. How can you get out of this situation without formatting and re-installing the operating system?
With Recover My Windows Password you can easily reset Windows XP password as well as get right into Windows XP. Simply follow this step-by-step guide to remove Windows XP password with a bootable CD/DVD:
Step 1: Create a bootable CD/DVD
Download the Recover My Windows Password and save it on any computer you have access to. Unzip the downloaded file, there should be an ISO image file: RecoverMyWinPassword.iso. Burn the ISO image to a blank CD using any ISO Burning software such as BurnCDCC.

Step 2: Modify BIOS to boot from CD-ROM
Boot your locked computer. When it is powered on, check the boot-screen for setup key (e.g., DELETE key, F8 key, F2 key) to enter BIOS Setup Utility.
Choose the BOOT menu and set Boot Device Priority option: Set the 1st Boot Device to CD/DVD-ROM. Press F10 to save your changes.

Step 3: Reset Windows XP password
Insert the burned CD/DVD into the CD-ROM drive of your Windows XP-based computer and restart the computer. The boot loading screen should appear immediately.

Wait for a few minutes until the Recover My Windows Password appears.

Reset Windows Local Password: Select the Windows SAM database (e.g., C:\Windows\system32\config\SAM), the program will automatically list all local user accounts. Select a user account and click the Reset button to reset the password to blank.
Click the Restart button to reboot the computer. Now you are able to log into your Windows XP-based computer without a password!
