CaffeinePrevent your computer from going to sleep If you have problems with your PC locking or going to sleep, caffeine will keep it awake. It works by simulating a keypress once every 59 seconds, so your machine thinks you're still working at the keyboard, so won't lock the screen or activate the screensaver. The icon is shown above - it's the leftmost one in the task tray, and this is all you see. Doubl
