i get this quite a bit at work. the potential fixes for this that i know are simply to uninstall and reinstall/update the driver through safe mode. if this doesn't work, then reformat. that will usually solve the issue for anywhere between a few hours to a few weeks before the issue returns. other than that, it's to swap out the video card. i don't know anything else to do other than that. what have you guys done to solve this issue other than what i've already said?