Windows defender WdNisSvc not starting

[Guest davehoskins]

Inherited a computer at work that has defender turned off. Steps for troubleshooting I took are as follows:

 

 

Re-enabled the Local GPO that was manually disabling defender. Rebooted..

 

 

Searched for other antivirus in the registry using the find function. None found. Assuming no other anti-virus was installed.

 

 

See that in the services, WdNisSVC is not starting due to not being able to "verify the digital signature" event ID 7000

 

 

Two other Services connected to defender are running.

 

 

Ran svc /scannow... Nothing wrong

 

 

Ran "Microsoft Safety scanner" nothing infected.

 

 

Trying to start defender via the app. Clicking the "quick start" starts the process, but no files are scanning, not time running.

 

 

Rebooted... Same effect. Any ideas?

 

 

Running Windows 10 but having to manually rely on updating. Not sure if that is an issue.

 

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