I have this HP Pavillion Slimline (tiny-ass-shit) computer which I've been using since I was in 7th grade. Before I flew to london for a week (about a month ago) my computer started to shut down after a little bit of playing of halo custom edition. Now what I mean by shutdown is cold shutdown, just shutting off without warning. Now, it's extended to every time I view a page with flash in it, within 30 seconds my computer will shutdown. Help please