WinLock is a utility you can use to to impose security restrictions and control how long others can use your computer. It runs from the system tray and requires a password to gain access to the available settings. It loads automatically with Windows and allows you to add an optional startup message, provide audio notification, and set the time limit. Once that limit is reached, Windows is summarily shut down. You can toggle the timer on and off from the tray. WinLock allows to disable Windows hotkeys, lock Windows desktop, or hide Start button and Switch bar.