I'm also in the throes of the dreaded BSD error problem.
My freezes are frustratingly random, from happening at the 'Log on' screen to not recovering from Hibernation, with a dozen scenarios in between.
The only consistent factors are that the cursor freezes, the HDD LED shines brightly without flickering and the only button on the keyboard that works is 'F Lock' but only to the extent that the F Lock activation light on the keyboard comes on.
My problems started the day I downloaded the update 196.21 for my nVidia 8400GS video card. I've since rolled back the driver, and deleted 196.21 from my computer. I've not run any driver cleaning program as there seems to be two schools of thought about that action.
On 12/3/10 I had 6 freezes. I ran every test suggested in this forum, my drivers are all up to date (except the video card) and turned off Hibernation, Sleep and changed my Power Plan to 'Performance'
What I have noticed from reading through this forum is that the BSD issue is not hardware specific, ie it is happening to posters running AMD and Intel, on a variety of Mobos and HDD's with all types and amounts of RAM and every imaginable Video Card combination.
This is now my fourth day without a freeze, but I made this statement prior to 12/3/10, the day I had six.
My question? Windows creates minidump files, but when I try to open them the pop-up tells me that Windows can't open the file.
What the ......... ! How bizarre.
How do I open .dmp files ?
BTW, I'm running Windows 7 64bit Pro.