Windows 7 crashes after Upgrade to Mountain Lion

Hi everyone,

I have been running a Windows 7 (Ultimate 64-Bit) on my iMac since I bought it without trouble under both "Snow Leopard" (shipped with the machine) and "Lion". After upgrading to "Mountain Lion" Windows always crashes with a "Blue Screen of Death" (BSOD) or "freezes" without an error message. This happens either during startup, before I can log in or within the first few minutes after loggin in on Windows 7.

The BSOD message are not consistently the same, and I cannot see a pattern. I now have a nice collection of *.dmp files found in the boot camp volume under /Windows/Minidump analyis of which points to all sorts of errors (file system, IRQs, etc., as I said I can't see a pattern there).

A memory test using the memory test tool shipped with Windows 7 on the DVD revealed no hardware faults. I am not aware of any other hardware defects and under OS X is running as it should.

I removed and recreated the boot camp partition and reinstalled Windows 7 using the original disk serveral times now. I found that Windows will run fine as long as I do not install the boot camp drivers (I tried both the current ones downloaded via boot camp-assistant and the ones on the Snow Leopard disk shipped with the iMac). Running Windows without some decent hardware support is however not really an option for me. Neither do I want to buy a PC or downgrade to Snow Leopard or Lion.

Any help, hints or tips are appreciated.

Regards

David