Windows defender will not auto run a quick scan

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Windows Central Question

I have the latest updates to Windows 10 16299.248, I am not sure why I can't get Windows defender to auto-scan. Every day I get a ! exclamation, all of my other machines have the same build and run it just fine.

1. Ensured the services were running and set to automatic.
2. Ran sfc /scannow - no issues
3. Exported and imported a known good scheduled task from another machine.
4. Created a new scheduled task pointing to the exe with Admin privileges.

None of the above have worked. I generally have to go in to the Windows Defender Security Center and run it manually.

No other Antivirus has ever been on this computer. . . Thoughts?
 
I'm having the same problem. It started two fast updates ago and has gotten worse. All my scan options are grayed out. Reported to MS but feedback as yet.
 

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