|Actually you can. Go into your screen saver options and turn off your screen saver! When this is done, your screen saver will not turn on unless your computer is locked, at which point it will kick in after 10 minutes or so.|
You can right click on your desktop, go to Personalize, go to Screen Saver, and under the type of screen saver select "None." Also, you can turn off the power settings so your computer will never go into sleep mode, you can do that through power options, however I would only suggest that if you have a good LCD and don't mind a power bill.