DCOM Component Properties grayed out in Windows 2008 R2

When you try to edit the Local Launch Permission of a DCOM component in Windows 2008 R2, the Properties window comes up with everything grayed out. Many have speculated that this is due to UAC or Group Policy. In fact it's the permission on the registry key of the classID of the component. Follow this article to change the permission on the registry key first, then the Properties window would have everything enabled.

http://blogs.msdn.com/b/emeadaxsupport/archive/2010/01/26/unable-to-edit-the-dcom-settings-for-iis-wamreg-admin-service-on-a-windows-server-2008-r2-when-trying-to-configure-kerberos-authentication-for-role-centers.aspx