Antigen 9.1 Hotfix Rollup 3 and Performance Monitorhttp://blogs.technet.com/b/neilcar/archive/2008/07/09/antigen-9-1-hotfix-rollup-3-and-performance-monitor.aspxWhile investigating an issue where mail was queuing in the Exchange Information Store, we discovered an issue that affects customers running Antigen 9.1 Hotfix Rollup 3 when there are performance monitoring tools such as Perfmon, Perfwiz, and the MOMen-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)