XPLock

XPLock is an easy-to-use and effective utility that can lock your computer's screen and programs. When you leave your computer unattended, you may not like other people to access it and spy your personal files or emails. By locking the computer screen, other people cannot access it even their have administrator accounts in your computer. You can also apply a password protection into a program (*.exe file). The protected program will ask for a password before it starts.