One option that often works is to key a nonblank user ID and leave the
password blank.
Click OK, and then if it asks you to confirm the password, click OK
again.

If you have given the system a nonblank password and you remember it.
Log on to windows using the user ID you have been using with the
password.
Go to the control panel and open the passwords icon.
click on the change windows password.
Key your old password and blank the new and confirmation password.
Click OK.

If you don't remember your password then you will need to delete or
rename the .pwl file with your user ID.
Keep in mind that this will cause you to lose any saved passwords.

Log off of windows and then key your user ID and blank password, click
OK, and then if it asks you to confirm it, click OK again.