Graphics card dying? 3 days ago my computer screen started to randomly make green squares appear, I rebooted and used "startup repair" or however it's called, then it was fine. But then later on, these green squares started to appear again and again. I've tried to use "startup repair" and system restore, but I believe its my graphics card that's gone bad. Tried rebooted many times and the squares still stay. Any idea what is the problem I'm having and how to fix it? I'd really appreciate it, thanks.