http://blogs.technet.com/srd/archive/2008/06/10/ms08-033-so-what-breaks-when-you-acl-quartz-dll.aspxIn some of the multimedia MSRC bulletins that have been released there is a workaround listed about changing ACL’s on Quartz.dll. So, what exactly breaks when we ACL Quartz.dll? Quartz.dll is a core component of the DirectShow framework. Originally aen-USCommunityServer 2.1 SP1 (Build: 61025.2)