I have had this problem for months, and now I am at the end of my tether. Basically if I have to explain it, this crash can happen any time any where. Browsing the internet, clicking an icon on the desktop, playing a game, watching a video, or just leaving the computer sitting there. It just stops...instantly, the clock stops, all peripherals like my bluetooth dongle turn off, however the screen doesnt loose its image, itll just freeze on what it was on, the power still functions and If I dont hard reset then It will sit there for hours doing nothing. On rare occasions I get a blue screen, very rare. I dont know if its hardware or software, Ive done RAM checks, they all come out fine, everythings upto date driver wise.