You got more info than I usually do.
I get a laugh out of my event logs, which basically say - Gee. What just happened?
First thing - if you have an nVidia card, make sure the driver is up to date. Second, if that's four cores I'm seeing; and you're running overclocked, you're going to have problems. Third - beats the heck out of me.
I've had five or six of these, but usually I skip the blue and go right to black - like, quicker than if I'd pulled the plug. In researching a solution, the first two statements represent the majority of problems and solutions tried. Updating the video card seemed to produce satisfaction for most. Personally, I'm still looking; and right now I'm leaning towards an integral system defect - meaning something that Microsoft is going to have to fix... but I've been running 7 for two months where it has dropped dead six times - but I'm not too worried. If it only happened once, ya got off easy.
Remember - 7 is not even "real software" yet, so some unexpected behavior is... well, expected. Oh, and the best advice (which I'm personally too lazy to take) is to get rid of that MSBS and put the penguin in there.