Harry does it only do it when you are gaming? If so you may need a graphics card upgrade, or your processor isn't handling the speed and info well enough to run the game. If you post the game you are playing and your pc specs someone may be able to advise you on the best course of action. Been there don that. My son used to be big on WOW and drove me nuts clocking the cards and demanding upgrades and quicker up and download speeds. Cost me a fortune (but I didn't care).