Update 6/22/09: KB972041 is out with a hotfix that resolves this issue [http://support.microsoft.com/?kbid=972041].  I guess you install it before, or in lieu of KB967831. OK so this blog post [http://blog.tiensivu.com/aaron/archives/1867-RtcQmsAgent-fails-to-start-on-OCS-2007-R2-server-and-causes-KB-967831-April-2009-update-for-Front-End-Server-components-install-to-fail.html] explains it well but it has