After you install Trend Micro OfficeScan on Windows Server 2003, or Windows 2000 Server, your computer becomes sluggish. Eventual it may hang.
This behavior is due to a leak in the system non-paged memory pool, eventually exhausting the pool.
NOTE: The Ddk pool tag, for driver allocated memory, is the largest consumer of the non-paged pool.
To workaround this behavior, uninstall the Trend Micro OfficeScan utility.