BSOD, fresh install crashing

I started getting BSOD 2 days ago. It would happen within a few minutes of boot and came frequently. I did a few things and finally said the hell with it, I'll reinstall windows 7. I did so and well during install my new friend BSOD, came to see me. So now I have nothing. When I try installing windows it comes up. Not at any given point, just when it feels like it. The error I get is system_service_exception.... (Bottom) ***STOP: 0x0000003B

Can't do any debugging or other things for info.

I assumed it is a memory issue. Just trying to get some light on the subject.

Thanks much