I've had this problem for quite a while now. At the end of October I bought this new computer: http://www.amazon.co.uk/VIBOX-Warrior-Multimedia-78LMT-USB3-Motherboard/dp/B007PBHLHM and installed Windows 8 on it. At the start it was fine, but about a month after it started to get the blue screen of death, the most common cause being system thread- exception not handled. I started to get these more and more frequently; recently, I expect to get it at least twice or three times a day. It also sometimes reboots itself for no reason, which is also quite annoying. As I have little experience with computers I am not really sure what to do, so any help would be greatly appreciated.