Go into safe mode with NETWORKING. Then, go to
http://www.Driveragent.com pay the $30 and have it scan your computer. It will find what driver is causing the bluescreen, and you can download the driver from the site. Blue screens are not about hardware failures (but it could happen) My guess is with installing the new SP2 your drivers got messed up and need to be fixed.
Then download spybot search and Destroy, and A-squared anti malware free version. Both free google it. then run both of them. Get all the nasties off.
Done properly it should allow you to boot up your computer to get it back to normal.
Also you can go to my computer right click, click on manage and go to event viewer and it might give you the driver that is causing that blue screen.
-this is only a suggestion that it might work (it works for me) use this at your own risk.