I have seen a 10% increase in RAM usage by turning on this feature. I wrote about it here when I first noticed it. http://windows7forums.com/windows-7-hardware/4668-10-increase-ram-usage-7100-x64-vs-7048-x64.html#post21921 I now have it norrowed down to this process. I use it all the time to stream everything (all media) to my HDTV through my Xbox360. I noticed it when I first installed 7100 x 64, previously on builds 7000 and 7048, this was not the case. Just wondering if anyone had any ideas why my RAM usage would go from 12% to 22% just by turning on this feature???