I want to lock my hard drive so no software or anything can be put on the computer. When I went to school they had a set up that if you downloaded something or saved a file directly to the computer and not your server, after you restarted the computer or shut if of it was gone, How can i have a set up like this?

what you describe at school was a system that was being reimaged at bootup. Ghost server can do this. You can play with local security policies but you risk locking yourself out of the system. If you just want to keep people out of your system put in a bios password. This will prevent disk access until the password is supplied.

I thought it was a key they used that had a hole on the back that your could lock or unlock..? If so where could i find one? How do i set the password though ?

Also where can i find this ghost server

Try a program called DeepFreeze, search for it on google, it is a program that no matter what is done on the computer, the changes will be gone after a reboot. Life is just a merry-go-round that keeps breaking down.

Alright thanks actually after i noticed the icon in my tray that is the program my school used because i always saw it.

Glad to be of assistance. Jazza Life is just a merry-go-round that keeps breaking down.