Read first then bash away: http://tinyhacker.com/hacks/cleanmem.
Guys you might try something like these "official" Windows 7 tips for clearing memory.
http://www.addictivetips.com/windows-tips/clear-windows-7-cache/
The one I've used is the "Clearing Memory Cache" option. I even have the icon on my desktop as suggested.
I fired it off while flying and it doesn't seem to bother anything. Not quite sure it's actually doing anything either.
The first time I used it during an extended flight it seemd like it took a moment to do "something". After I flew on for several more hours I clicked the icon again. The second time it took half a moment to do "something".
I just don't know what that "something" is but it made me feel better.
FAC