Ok, here is what you have to do, when windows boots again, run it in safe mode. If the blue screen of death ( bsod ) happens in safemode, then it is likely the problem with your hardware, like the RAM or GPU.
Download this
http://www.fiberdownload.com/Transfer/BlueScreenView/19771
its a blue screen viewer, all you have to do is open the minidump folder in windows folder in C drive and tell us the problem you face which you see in the blue screen viewer.
check this video, it will help you
http://www.youtube.com/watch?v=Q4M73XYQCWo