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"MMC could not create the snap-in"


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#1 ray5450

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Posted 15 January 2018 - 12:12 PM

I cannot access Task Scheduler.  ("MMC could not create the snap-in")

There are no error codes or other statements accompanying this message.

 

Here is what I already tried from other sources, for which the posters said things like, "this worked for me", "this will work or I'll eat my hat", "I know this will work", etc., but none of them worked:

 

1

C:\Windows\Microsoft.NET\Framework\v2.0.50727\CONFIG
delete machine.config

 

2
Windows features on/off:  check mark in box for .net framework 3

 

3
Added a line to environment path (don't remember exactly what is was)

 

4
https://social.technet.microsoft.com/Forums/en-US/dbd9c44d-629c-4188-9d77-7a9a7e5c6244/mmc-could-not-create-the-snapin-event-viewer?forum=w7itproperf

 

5

(This is a new Windows install.)

 

6

(.Net framework also newly installed.)

 

 

I am seeking a solution to access Task Scheduler.  Thank-you.



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#2 ray5450

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Posted 22 January 2018 - 08:31 PM

Is there no solution?



#3 Eyesee

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Posted 23 January 2018 - 04:41 PM

Commonly Task Scheduler task image is located in : C:\Windows\System32\Tasks
Delete related corrupted image in this folder and see if the issue occurs.

Delete related registry item in the following location.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\TaskCache\Tasks
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\TaskCache\Tree
 


In the beginning there was the command line.

#4 ray5450

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Posted 24 January 2018 - 07:51 PM

Thank-you, for your response.

 

Are you saying to delete all the contents of C:\Windows\System32\Tasks?



#5 Eyesee

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Posted 27 January 2018 - 12:25 PM

Yes.

Then run regedit and delete the two registry keys.

I have fixed this issue often by doing this


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#6 ray5450

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Posted 28 January 2018 - 10:06 PM

Okay, I did just that, but no change.



#7 Eyesee

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Posted 01 February 2018 - 03:21 PM

That should have fixed it.

See if you have a problem running defrag too.

Typically a corrupt task scheduler prevents defrag from running as well

 

Make sure you have done the following:

 

Use file explorer to navigate to C:\Windows\System32\Tasks

Delete everything in there

 

Click the start button

In the search box type "regedit" without the quotes

Navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\TaskCache\Tasks

Delete the tasks branch

Navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\TaskCache\Tree

Delete the tree branch

Close registry editor

 

I have fixed this hundreds of times doing exactly what I posted.


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#8 ray5450

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Posted 02 February 2018 - 08:56 PM

Thank-you, for your response.

 

Yes, defrag runs.

 

The Tasks folder i(C:\Windows\System32\Tasks) had 2 other folders in it, but the dates of those folders were after the date that I deleted them the first time.  I emptied it again.

 

When I first deleted both Tasks branch and Tree branch, they each were full of data settings.  When I checked now, the Tasks and Tree entries had reappeared, but they were void of any data.  I deleted them again, anyway.

 

I then tried to open Task Scheduler again, and it is still blank, except for ""MMC could not create the snap-in"".


Edited by ray5450, 02 February 2018 - 08:57 PM.


#9 Eyesee

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Posted 03 February 2018 - 03:14 PM

Hmm... It has always worked for me


In the beginning there was the command line.

#10 ray5450

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Posted 03 February 2018 - 08:20 PM

Any other suggestions?



#11 Eyesee

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Posted 04 February 2018 - 07:59 PM

None unfortunately. That solution has always worked for me.


In the beginning there was the command line.

#12 ray5450

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Posted 05 February 2018 - 08:56 PM

Does anyone know of another site to refer me to that might solve this?  Thanks.



#13 ray5450

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Posted 21 March 2018 - 05:36 PM

I found a post on another site where someone backwardsly removed .Net Framework updates one by one until this issue was solved.  It was posted as update KB2844286.  However, I do not have that update installed, so I uninstalled all other .Net Framework updates, which took a long time to look them all up in order to know that, and still, no change. 

 

I also made an install on a spare drive with no updates at all, and the issue does not occur.  I conclude that there is some other update that is causing this.  In my spare time, I can add a few updates at a time and figure out which one it is, but before I do that, does anyone have any idea which one it could be?  I have searched and found nothing else.

 

While doing the above, I kept a restore point to go back to, but as I uninstalled each update, it moved my beginning restore point down the list.  Before it went off, about 3 from the bottom, I intended to restore it, make another one (back to the top of the list), and then restore where I left off.  However, I got the message that my original restore point was "damaged or deleted" during the restore, even though it was 3 from the bottom.  Hmmm.  I ended up restoring from a Macrium image after I went through all the uninstalls.



#14 ray5450

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Posted 04 April 2018 - 04:44 PM

**SOLUTION**

As I previously posted, I made an install on a spare drive with no updates at all, and the issue does not occur.  I was intending to rebuild the install and checking after each update, but I thought of something else to try first.  I searched around in the registry and I found entries with both "MMC" and "snapin".  Included also there, were number codes similar to other people who had this problem, but the error they got included an error code that matched one of these numbers and my problem does not give any error code.  Instead, I exported the whole section of these entries, moved them to a flashdrive, switched the hard drive back to my working drive, opened that registry, opened the export in notepad, and compared them.  I found that there were 2 entries missing from the system receiving the error:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MMC\SnapIns\FX:{c7b8fb06-bfe1-4c2e-9217-7a69a95bbac4}
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MMC\SnapIns\FX:{c7b8fb07-bfe1-4c2e-9217-7a69a95bbac4}

The data of each entry includes "taskscheduler" things, and refer to its help files.

I switched back to the new install and exported only those 2 entries, and then imported them into my working system:  FIXED.  Apparently, Taskscheduler will not run without these entries related to its help files.

I don't know how these entries got removed.  It could be one of the other updates, or it could be something else.  If I ever have to rebuild this for some other reason, I'll find out then.

I noticed other posters there described this same problem, but like me, none of the solutions worked and the issue went unsolved.  Maybe this is also their solution.






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