This fixed it for me

HCL Notes/Domino 8.5 Forum (includes Notes Traveler)

Subject:

I was having the same problem but it took months before the mmc.exe started terminating abnormally every single minute. For a very long time it would only terminate every so often.

I renamed the mmv.exe file to mmc.old then restarted Domino. Problem did not go away.

I went back and found that a new mmc.exe had been created and I ran it then found that others had previously opened the services snap in (from the recent files menu) and I opened that. When I went to shut down MMC Console a prompt appeared saying the services snap in was saved using an earlier version of mmc and did I want this to be updated to the new version. I said yes. Rebooted the machine and the problem went away.

Though this might help others in the future.

Feedback response number WEBB7YLKWG created by ~Wei Minluflar on 12/10/2009