I had this about ready to submit on the freezing PC and it froze. Now using my backup PC, I first checked it's System History and there are some changes from things I have done but not the constsnt chages of the same items as the other PC.
1st changing example: CHANGED NVIDA nForce ADMA Controller property "StartingAddress changed from 2544 to 2416 and the last part of the line is Port Resource. This line gets changed and rechanged several times on the page. There are similar lines for Parallel ATA controller, PCI management. A half a dozen or so just saying Motherboard Resources. There is a lot more that what I am showing and most have to do with the M/B and its functions.
There are several for my GeForce 7950 GT video card. 8 or so for PCI Bus. One for PCI-Express Root Port.
Some of this last bunch say Device memory at the end of the line.
I have recently installed this system in a better Case, so I am rechecking everything I did. It seems there has to be some hints here with this history.
I did use MEMTEST86 on my memory but maybe something happened? I will keep at it. I also did a fresh install of XP media center on a new hard drive to get away from other 4 year old problems and now this. I also added a KWorld FM and TV card and it seems to work great, but I might change its PCI slot?