Hi. My PC has been crashing a lot. It's about 3 years old now, I'm not sure what model it is but it's a Packard Bell gaming machine. I get one of two crashes: Screen freezes and computer becomes unresponsive. If I reset the machine then nothing happens on the screen at all and nothing will boot. To fix this, I have to open the machine up and reseat every RAM stick. This crash was random but it also happened every time I plugged my headphones in to the rear headphone jack. Blue screen of death. I've not got the error code for this because I haven't used my computer for nearly two months. At first I thought it was my RAM as the problems stopped for a few weeks every time I removed a stick. However, the problems always returned and I ended up with a single stick of 2GB. I'll post my specs below: Processor: Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz RAM: 5GB (2x2GB Crucial memory and 1x1GB Corsair) OS: Windows 7 Home Edition Graphics: NVIDIA GeForce 8800 GTS My stepdad cleaned the computer entirely - the case and all the components with air (he was gentle) and everything seemed to be fine, but the computer crashed again just now. Can anyone tell me what might be causing this? Any help would be appreciated. Thanks.