winmgmt /salvagerepository Fails

I recently have the problem where Windows Defender turns itself off and I have to restart it on reboot. According the articles I read, it could be related the the WMI repository. When I try to run winmgmt /salvagerepository I get the following:

C:\Windows\system32>winmgmt /verifyrepository
WMI repository verification failed
Error code:     0x800700C1
Facility:       Win32
Description:    %1 is not a valid Win32 application

Where do I go from here?
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Repairing and re-registering the WMI

Several methods that have always been a great resource for me in a WMI problem....

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