If you forgot your Password or want to Log on to others computers; just follow this process.
~~: Process: ~~
1) Start computer.
2) When it asks for password press ctrl+alt+delete keys twice.
3) Now another window opens asking for password.
4) In this at the place of user name just type "administrator".... Leave the Password field Blank and Hit Enter.
5) WOW!! U have logged in as a normal user.
6) Now you have full authority only problem is that you can't open "My document" of the original account.
[NOTE: Work only if Admin account is not protected.]