Tools like ERD Commander can help reset the password of any Windows system. You can also look for
the free systemrestorecd which will blank out passwords on MSFT OSs.
Four steps can help you reset the lost Windows 8/7/vista/xp/2008/2003/2000 password:
Step 1: Download Windows Password Rescuer/Windows password recovery tool on any available computer you have access to.
Step 2: Install Windows Password Rescuer and run it to burn a bootable CD/DVD or USB flash drive
Step 3: BIOS setting of your locked computer to set it boot from CD/USB.
Step 4: Insert the newly CD/USB to the computer.Reset Windows password successfully after Windows Password Rescuer starts.You also can use Windows Password Rescuer to add a new user with administrator privilege to your Windows when you can not find target user. With this New user account you can logon your locked computer directly to copy important data from the locked computer if you want to reinstall your Windows system at last.