Speed Up Windows 2003

Warning: Perform a system backup before making changes to your registry

There is a registry setting that is enabled for 2003 that is now disabled in 2008/Vista. This updates the last-accessed time of a file when applications open, read, or write to the file. This plays a part on Virtualized servers do to a increase in Disk I/O and CPU load.

http://www.microsoft.com/whdc/system/sysperf/Perf_tun_srv.mspx is a whitepaper from microsoft about this setting

HKLM\System\CurrentControlSet\Control\FileSystem\NTFSDisableLastAccessUpdate

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