Hello there, I recently starting having a strange problem, with squares popping up over everything. Now, it only happens during firefox, and once in photoshop, and goes away if I move something or change screen. Sometimes the screen will go black and it'll say my graphics drivers where having problems but have now been resolved. I've no idea what's causing the problem, and what I can do to fix it. Amazingly, I got a screenshot of it, despite I didn't think that would work.