I need to password protect the entire computer

"I have solved my own problem.

What I did was right click any .EXE I wanted to prompt me a password -> Advanced -> Checked off ""Run with different credentials"". Easy fix that anyone could have figured out if they took the time to think a little!"

"Why not just set a BIOS boot password? That way nobody can even boot up into Windows without authenticating.

After your comment, it seems setting up a kiosk solution would be better if only browsers will be accessed. Since it's using multiple browsers, you could use 1 account per browser or set up a hotkey to switch browsers.

You can start up IE with the -k switch for kiosk mode.

For Firefox, look into the R-kiosk add-on (only supported up to FF 3.1b3 though unfortunately).

Certain keyboard shortcuts still work in some of the kiosk modes, you can combat the possibilities with AutoHotkey to remap any combinations you'd like, and even create a very complex combination to unlock it if you need to change something. Of course you can take extra security measures with group policies, and create a backup in case some crafty fellow manages to bypass everything.

For a fairly cheap software solution ($10), WinGuard Pro does what you want. There is a free version as well but it is fairly limited in functionality."

"Sounds like you're asking for full disk encryption. You'll need to enter a password once when the computer boots, but nothing will be accessible until you do and you will not need to enter it again. It's a little more practical than encrypting every file individually.

Check out TrueCrypt. Be careful, though; if you lose your password or mess something up, you could permanently lose your data.

If this isn't the case, state your needs a little more clearly."