Random and increasingly frequent BSOD's

Hi

I am running Windows 7 Ultimate, 64 bit on a 3d graphic workstation.
24Gb Ram, 6 cores and a nVidia Quadro 4000 video card.
The system is one year old, purpose-built by professionals.

I have had some flaky graphics-card performance for a long time with the display driver crashing and restarting when switching between Photoshop and 3ds Max, but more recently the system took to bluescreeing randomly.

After a Windows update on the 16th of February the situation became severe, with programs failing to start (particularly Skype for some reason, but also browsers, Image viewers.) after a reboot they would sometimes work for a while again and then crash. Windows explorer itself started crashing for a while, but came back to life after a reboot.

I have upgraded all my drivers, and today I uninstalled all video drivers for the Quadro 4000 card and reverted to the original driver version that windows installed on it's own accord. This is also a nVidia driver but old. This has seemed to make the system much more stable, but I still had a random Bluescreen when hovering the pointer over a normal web-page object a few minutes ago.

I have opened the computer, checked for glitches and generally cleaned it inside - it appears ok, and I have been able to run a window with HD-video parallel with a heavy 3d transformation in 3ds Max, streaming youtube videos in a browser while letting photoshop do a batch filter operation all at the same time with no problem.

There are still BSOD's at random times, like a flash from a clear blue sky.

I have included a zip with the health reports and dumps indicated in the forum rules section (It's all in this zip), and as I do not know how to interpret these myself I would be very grateful if someone with better knowledge in this regard would be able to offer his or her perspective on what I might do to stabilize my system!

Any info appreciated!

Best wishes,

Henrik

ok, done. Do you need me to post new logs files?

Not yet, but if I start using the system I probably will. Should I wait until I do and then upload a new zip with logs?

ok, great I will. Thank you for your help so far!

Absolutely, I will.

No bluescreen yet, but I think it was way close just now - I was playing a wmv file and the system froze, monitor went black, and the video signal light switched off, then it all came back on and windows told me the Video driver had crashed and rebooted.
There is the occasional white flicker on the screen now as I have the wmv file open...