HOW TO PROTECT THE SYSTEM FOR M THE OTHER PEOPLE USE

Usually most of the people protect their system by setting a password for login.
But i am going to tell you another way of protecting the system. by using this way no one can use your system even after knowing your password.
follow these steps and enjoy:

1. Restart your system.
2. when it get restarted press F2 to view setup view the system setup setting window(in most of the system the setup setting are viewed by pressing F2) .
3. now in setup setting window go to main setting 
4. now go to SATA MODE settings and press ENTER.
5. now change the mode of SATA form IDE to ACHI.
6. now press F10 to save the changes and press Enter.
7. now your system will get restarted again and again.
8. now press the shutdown button to shutdown your system.

now no one can use your system
now if want to use the system again then follow the same procedure and change SATA MODE to IDE again 
save the changes and now you can use system again.