WSUS 3.0 SP2 on a 2008 R2 server MMC has detected an error in a snap-in an will unload it

 WSUS 3.0 SP2 on a 2008 R2 server MMC has detected an error in a snap-in an will unload it

The WSUS console now fails to load and reports the following error :

"MMC has detected an error in a snap-in and will unload it."

Problem signature:
  Problem Event Name:    APPCRASH
  Application Name:    mmc.exe
  Application Version:    6.1.7600.16385
  Application Timestamp:    4a5bc808
  Fault Module Name:    KERNELBASE.dll
  Fault Module Version:    6.1.7601.17514
  Fault Module Timestamp:    4ce7c78c
  Exception Code:    00000000
  Exception Offset:    000000000000a49d
  OS Version:    6.1.7601.2.1.0.272.7
  Locale ID:    5129

Additional information about the problem:
  LCID:    5129

There is missing data for Type in registry

HKLM\Software\Microsoft\MMC\Snapins\FX:{8b6499ed-0241-e032-6508-da4b1c879d7e}\Type.

The value for missing data should be

Microsoft.UpdateServices.UI.SnapIn.Common.SnapInManager, Microsoft.UpdateServices.UI.SnapIn, Version=3.1.6001.1, Culture=neutral, PublicKeyToken=31bf3856ad364e35

Put it back and WSUS is working again.