Event Viewer: MMC Could not create the snap-in, Win7 Pro

Have a client that has a fairly important Win7 Pro workstation with this problem. Also cannot get IIS Manager to launch (does nothing). Hence, I wanted to check the Event Viewer to track down the issue. Got the screen below.
Have tried several things, referenced here:
http://answers.microsoft.com/en-us/windows/forum/windows_7-performance/event-viewer-mmc-could-not-cr...
 including exporting and deleting the referenced SnapIN CLSID key in the registry. SFC /Scanow, etc. But not getting anywhere thus far. Really do not want to re-image or reinstall if it can be avoided.
Anyone run into this?Screen shot
zicemanAsked:
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*** Hopeleonie ***Connect With a Mentor IT ManagerCommented:
1) Did you try deleting all configuration files under %userprofile%\Application Data\Microsoft\MMC and restarting Event viewer and Task Scheduler?

2) Please navigate to the following registry:

HKEY_LOCAL_MACHINE \ SOFTWARE \ Microsoft \
MMC \ SnapIns \  wert.PNG
 export the above registry (as a backup), then delete it.

3) also try this:
http://www.kapilarya.com/mmc-could-not-create-the-snap-in-windows-10
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zicemanAuthor Commented:
Update: I have found that the same MMC problem occurs with Task Scheduler. But most of the SnapIns, including Services, run OK. Also, other key programs on the workstation are still functioning. 
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joinaunionCommented:
Can you confirm you have .Net framework installed? If not go here https://www.microsoft.com/net/core#windows download NET Core 1.0.1 - VS 2015 Tooling Preview 2 and try again.
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zicemanAuthor Commented:
Yes, .NET 3.5 s in installed. I have tried to the trick suggested of enabling & disabling it in Windows features.  Also, I tried the fix of renaming  the file %SystemRoot%\Microsoft.NET\Framework64\v2.0.50727\CONFIG\machine.config.

Nothing has worked thus far.
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zicemanAuthor Commented:
Thanks for the post, Hopeleonie. I dd try tot delete the entire HKEY_LOCAL_MACHINE \ SOFTWARE \ Microsoft \
MMC \ SnapIns \   registry section, but I did already delete the the CLSID: FX:{ ... }  keys that were related to the Event Viewer and Task Mgr (as referenced in the link provided).  This had no effect. After rebooting the keys were not automatically recreated.
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joinaunionCommented:
You can try the fixit here or use the fix it myself on same link.
https://support.microsoft.com/en-us/kb/914231
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