I did a clean install of 3186 last night on a C2D iMac and set it up to use my boot camp partition which has Windows XP Pro installed on it. The install went great even though I had to call MS to reactivate XP in the VM. I also ran into the problem where Office demanded to be reactivated, but fixed that by changing the MAC address of the VM to match the Airport MAC address. I booted back and forth between the VM and boot camp, several times testing various programs to make sure they worked in both environments and Windows was fine until suddenly, when I natively boot XP through boot camp, XP is now blue screening within a minute of the desktop coming up. Happens every time I boot XP natively, but does *NOT* happen when I boot XP through the VM. XP is working like a champ in the VM, but not natively. I installed WinDbg to look at the crash dumps and the crashes are either caused by ntkrpamp.exe trying to execute code in non-executable memory, or another error, can't remember the exact message, but it was basically trying to read an unmapped memory region, but what program caused that error can not be determined. My first thought was a memory problem, but if it was, I'd expect to see kernel panics in OS X as well, which I'm not, even with Parallels running. Unless someone else has a better idea, I'm going to try running the repair option from my install CD when I get home from work tonight. I've searched the forums trying to find other posts that were similar to my problem, but I've come up empty. Has anyone else experienced this problem or something similar and might have some suggestions on what I can do to fix the problem? Thanks.