DISABLE WINDOWS SEARCH. So damn simple I wish I remembered this
   old trick a long time ago: My Server, which is roleplay /
   creative and has 96 GB worth of Worlds (its way too huge - and I
   don't delete anything) has grown to use up about 5G of memory on
   a 64bit Windows 7 system. Subsequently, it gets LAGGY. I've been
   fighting with this lag for so long now I just gave up... until
   today. I remembered an OLD TRICK from Windows 2000 days: Disable
   Windows Search. It runs ALL OF THE TIME - I NEVER use it. (do
   you?) It's constantly indexing files "in the background" (hah -
   in the background is not true if you can't watch a youtube video
   without hiccuping or your server takes 5 minutes to load) - ....
   it's always working as files change -- well, your server is
   constantly wrting changing to your hard drive, which windows
   search is constantly reindexing. Get rid of it - administrative
   tools : services : Windows Search - STOP and DISABLE. Or hit
   Windows-R and type services.msc - and then get RID OF IT! If you
   miss it, put it back. Forget the warning.. If you don't use it,
   don't keep it. Kenneth Udut Naples, FL