|IF it is the windows password and you have a disk, at the login|
Click Reset password, and then insert your password reset disk (or other removable media).
Follow the steps in the Password Reset Wizard to create a new password.
Log on with the new password. If you forget your password again, you can use the same password reset disk. You don't need to make a new one.
If it is a bios password/hard disk password the cd wont help you.