Unable To Open MMC On Windows Server 2008


 Unable to open the Microsoft Management Console on Windows Server 2008 after installing Windows Updates. MMC fails with the message: 

“MMC could not create the snap-in”.

MMC could not create the snap-in. The snap-in might not have been installed correctly.

Name: Server Manger

CSLID: FX:{18ea3f92-d6aa-41d9-a205-2023400c8fbb}


Invalid entries were added to the machine.config during Windows Update.


To fix the problem, run the following command:

c:\Windows\Microsoft.NET\Framework\v3.5\WFServicesReg.exe /r /b

After running the command enable the feature .net framework 3.0 under Add features in Server Manager.

Open Server Manager
Select Features
Click on Add features
Select the check box for .Net Framework 3.0
Click Next and follow the steps to complete the Add Features Wizard

If these steps do not alleviate the issue, carry out the following steps to replace the Machine.config file with a known good version:

1. Navigate to C:\Windows\Microsoft.NET\Framework64\v2.0.50727\CONFIG

2. Rename Machine.config to Machine.config.old

3. Copy Machine.config from a known good server.

More Information

This problem occurs if the .Net Framework 3.0 feature is not enabled and an update for .net framework 3.5SP1 is installed (which could be through the windows update or through a deployment tool).

The command removes the entries added in the machine.config during Framework updates.