http://blogs.msdn.com/b/vsnetsetup/archive/2010/12/06/mmc-could-not-create-the-snap-in.aspxAfter installing KB2416473, while launching MMC it may throw the following error: Here is the complete workaround: 1) If 3.0 is installed ("C:\windows\Microsoft.NET\Framework\v3.0\Windows Communication Foundation\ServiceModelReg.exe" existsen-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)