BSOD after installing a 5850. (W7x64)

Hey guys,

I first posted this in the hardware forum but thinking about it i feel it may be a software/windows issue.

I'v just bought a new ATI HD 5850, which i am so pleased with.

Now when i first installed the card the system booted i installed the drivers (v10.3) no problem. Once they installed i re-booted and as windows loaded i got a BSOD. I decided to try once more to boot into normal mode and success the system booted fine.

Once im in, im having no trouble at all. The sytem runs really well. Then the next time i reboot i go through the whole proccess again.

Somethings not quite right here, any help would be greatly aprecated.

System specs:

• Intel Core 2 Quad - Q8300
• Gigabyte GA-G31M-ES2L (I know :-o)
• 4Gb PC1600 RAM
• ATI Radeon HD 5850 (Power Cooler)
• OCZ 600MXSP 600w PSU
• Windows 7 Ultimate x64 (Fully up to date)

note: All components are curently at stock speeds.

Please also find attached four .dmp files from the crashes. If you need anything else just ask.

Thanks again for your time.