Here's some background info, I have a pc built by me and up until yesterday It was working 100% fine. I could play games etc... no problems whatsoever. Basically, I keep my grinder (weed smokers know what this is) on top of my hardrive bay. I hit against my pc and the grinder (which is quite heavy, made out of metal) fell down and landed ontop of my gpu. immediately, my computer restarted (weird). the pc itself has been running fine, surfing the web and using skype etc is fine. but when I try to play GTA4, which i've been playing recently up until the incident with the grinder, I get a blue screen of death and my computer restarts.