I would recommend taking it to a shop. Blue screens are indicators of hardware failures (whether physical or driver), and it sounds like you have gotten it to the point of no easy return. It is possible that it was rotten timing and it's a coincidence that the AVG scan completed shorly before you have suffered a drive or some other failure. If you have anything that you really need recovered, and the drive is physically OK, any shop should be able to get your documents backed up before performing a repair install or clean install.
Q "Why do you like Duke, you didn't even go there." A "Because my art school didn't have a basketball team."