The problem does occur with faulty or not fully accessable RAM. I tested it with 2x2GB RAM and didn't have any problem at all, then replaced them by identical RAMs and got the error all the time. I got a new pair, now it works like a charm, even with 8GB.
@ JG27CaptStubing & Thunderbolt56
It's fascinating how many people fall for the new marketing, that Win7 is just soooooo much better than the Vista it is 100% based upon.
Well, anyway, since you read the links posted so throuroughly, you must have noticed, that the
"nvlddmkm"-Error was confirmed in Win7, too, and was already posted not to be fixed for the initial release, as it is not finally cleared out, who is responsible for the error.