Bodhi,I have just experienced the same problem as you have. About a week ago my system started acting up exactly the same as yours. I thought it may be software and restored my HD from an image from a month ago. After a bit the blue screen and reboot happened again and several more times. I had built my system in March using Crucial Ballistix RAM. A month or so ago, I wanted to add 2 more GB of the same type but when I went to Newegg, the reviews really slammed the Crucial RAM so I held off buying it. Many failures happening within a few months of installation. Ah ha, a light comes on. I replaced my RAM with some Corsair and so far no reboots, everything fine. Try replacing your RAM, it worked for me.Salute,BeDee