If you share your computer with others and do not want to let others share certain applications installed, then you can lock or password protect them with the help of a freeware lightweight tool known as WinGuard.
It just magically put all the controls in your hand and restricts all the other users from accessing applications without the administrative password.
Winguard has two variations available for download. While the free version allows you to do some basic stuff without paying any money, the pro version allows you to some advanced features like password protecting some custom applications. The free version is restricted only for the personal non-commercial use.
WinGuard Pro (Free Edition) enables you to password protect access to various Windows features and programs, including Internet Explorer. Live Mail, Messenger, Task Manager, Computer, Control Panel, Media Player, Folder Options, Command Prompt and more.
There are some other applications also available on Internet for download like AppLocker and LockAnExe, but I have found Winguard to be more versatile and easy at the same time. I highly recommend it if you are on the lookout for a neat tool to lock, secure or password protect applications on your computer.
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