Hi!
I have experienced a couple of 'Blue Screens'. Mostly its as a result of hardware. It will behave like this (bring the blue screen) when you connect any peripheral such as new Hard disk, CD/DVD Drive or RAM Chip after windows is already installed.
However, I have managed to stay away by making sure that I do not install new hardware after installation of windows. If I do, I reinstall the O.S (Operating System).
For your case, backup your machine, format the HDD and make a new installation of Windows. This should help.
Let me know how it goes...
Edgar