I have a 2010 mac pro 12 core system which I run bootcamp and I have always gotten the following error in the error log every time I boot the system into Windows 7 X64: WHEA LOGGER EVENT ID 46: A fatal hardware error has occurred. Component: Memory Error Source: Machine Check Exception This error is always there, but my machine is actually stable as far as I can tell. I am just bothered by the constant existence of the error and don't like thinking it could be affecting applications from time to time. Now the thread I linked to below states that dual core xeon motherboards (EVGA SR-2) which is the PC equivalent to the 2010 Mac Pro motherboard (I think) - had the same problems for months, but then they released a new bios and the problem went away. Of course there is no BIOS in boot camp, so I think this error will not be solved until Apple fixes something in Bootcamp and releases a patch?. Not sure if this is a well known issue, but I suspect everyone with a dual CPU motherboard on any recent Mac Pro's gets this error or some form of it in Bootcamp running Windows 7. Take a look at this thread here, I think this is related to my problem: http://www.evga.com/forums/tm.aspx?m=536769&mpage=1 I have this error in the event log on every boot up of win 7 x64 (aka in bootcamp). It is there every time. I know there is nothing wrong with the memory in my macpro, I have run every test imaginable on it. Any thoughts on how to make this go away?