I stumbled upon a neat piece of software the other day called mouse jiggler.  We've all had it happen, your watching a movie on your laptop and all of the sudden the monitor goes out.  You reach for your mouse and swipe the pad to bring your screen back on.  Then (if your me) you change your power settings and tell the computer to stay on.  Movie ends, you have to remember to put it back or the battery will die the first time you walk away and get distracted by a squirrel out the window.  This neat little utility will actually fake a mouse jiggle every few minutes, and your pc doesn't know the difference,  Avoid the embarrassing  AC~DC screen saver poping up in the middle of an important business PowerPoint presentation.   Now for windows media player or VLC, a mouse jiggle means the playback controls pop up on your screen.  To bypass this you simply press the Zen Jiggle checkbox for an invisible mouse jiggle that will keep your computer awake without disturbing your movie.  You can download mouse jiggler here.