Lately when I'm playing WoW,CS, or sometimes just browsing the net my computer will freeze and sometimes restart. When it freezes the graphics freeze but on my headphones I hear a bit of static. When it freezes and shuts down it does all of the above, then the screen goes black, then I hear a high pitch solid tone then the computer restarts. The freezes happen maybe like twice a day but they go on for a few minutes multiple times. This just started like 2 days ago and I don't recal changing anything in my system.