Hands-down the best tools for determining what is going on on a Windows system are Mark Russinovich's and Bryce Cogswell's Sysinternals Tools.  Frequent contributor Roseman has pointed out that Microsoft is asking for your help improving the Sysinternals tools. Over at the Microsoft Technet blog they are requesting Sysinternals users to take a short survey.

If you are a Sysinternals user please consider taking five minutes to contribute to their future.

-- Rick Wanner - rwanner at isc dot sans dot org