I need to unlock my sony vaio vgn-nr280e logon password. can u help me onlock it.

1. Restart the computer.
2. At the SONY screen, press the F2 key.
3. In the Setup Utility window, press the RIGHT ARROW to select Security .
4. On the Security menu, press the DOWN ARROW key to select Set Machine Password .
5. Press the ENTER key.
6. At the prompt, in the Enter New Password field, enter the desired password.
7. Press the ENTER key.
8. In the Confirm New Password field, retype the same password.
9. Press the ENTER key.
10. At the Setup Notice prompt, press the ENTER key. NOTE: To set a user password, repeat steps 4-10, selecting the Set User Password option.
    
11. Press the F10 key.
12. In the Setup Configuration window, press the ENTER key.
13. Press the RIGHT ARROW to select Exit .
14. Press the DOWN ARROW key to select Exit Setup .
15. At the Exit Setup prompt, press the ENTER key.

Please follow the instructions in my tiphttp://www.fixya.com/support/r10240812-reset_windows_2000_xp_vista_7_login