Screen out your screensaver

Screen out your screensaver
Sometimes you leave your desk for a while but you don’t want the bother of having your screensaver take over. But you don’t want to permanently disable your screensaver either, because sometimes you do want it to come on and hide your work. So, to temporarily prevent your screensaver from coming on, simply click the Start button once and walk away.
The Start menu will stay open indefinitely, preventing the screensaver from activating.
For better system performance and stability, don't use a screensaver at all. These programs actually don't do anything useful, and they do consume system resources. See Mindconnection's