My PC is about 4-5 years old I suppose and I've been gradually upgrading it over the time.
Haven't changed anything since this problem started happening, only had to take out the motherboard at one point when I was getting a new one, and then had to put the old one back in as I couldn't get the new one. (everything seemed to be fine aside from 2-3 screws that wouldn't go in, couldn't align it properly, but as long as it works, right?)
I can play some graphically intense games and not have any problems with it, but at random times my screen starts flashing on and off a couple of times (PC becomes unresponsive during the flashes) and I get this bluescreen every now and then (like once in 2-3 days or more) while browsing forums and youtube with Firefox. (java or flash related maybe?)
I've tried updating my gfx drivers, still got crashes, then updated it to the beta drivers and still no change in the crashes.
I use Win7, GTX550Ti, Q8300 CPU and Asus P5G41C-M LX mobo.