I'm using Vista Business x64. Nope not Nvidia. ATI Radeon HD 5450. It's a "SYSTEM_SERVICE_EXCEPTION" and it only happens when i'm cleaning up my PC (so far). I had the BSOD three times tonight when I had my "now" external 1TB Hard Drive on (it was originally my internal HD that came with the system. i'm running Windows on an SSD now.) My hard drive is currently off.
And I can't switch my video card slot. It only fits in a PCI Express x16 slot, and I only have one of those. The other three slots are PCI Express x1.
I don't know entirely what a "SYSTEM_SERVICE_EXCEPTION" is.
This didn't start until about a month or so ago. I've been adding so many new things to my PC, and I bet that my current PSU is under stress and can't power all the components equally. (Maybe my SSD's not getting enough power now because of all this). That explains why it BSOD's more often when extra components are powered up.
I might check out the chkdsk command another day, if it still continues. And I don't think it has to do anything with the video card. It works just fine. Haven't updated any video drivers since I first installed Windows.