Windows Defender User Interface not working

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Windows 10 Pro

 

Version 1803

 

OS Build 17134.345

 

 

I noticed that the Windows Defender shield is not showing up in the system tray, so I went to the settings to check the status. Settings, Update & Security, Windows Security. In the main pane, the only thing listed is the button to "Open Windows Defender

Security Center." There are no stats listed for the definition or anything else in the pane--it is blank.

 

 

 

When I click the "Open Windows Defender Security Center" button, it doesn't open. The mouse busy signal flickers continually and nothing happens. The CPU goes to full capacity, but nothing happens. The computer must be restarted for it to stop. Windows update

history shows Definitions were installed today.

 

 

When I restarted the computer, the shield appears for a second, but as soon as the mouse hovers over it, it disappears.

 

 

 

I installed Malware Bytes, ran a scan, then uninstalled it. No change in settings and windows defender user interface still not working.

 

 

I also ran sfc /scannow which found and corrected files, but the problem persists.

 

 

 

I'm stuck. Please help?

 

 

 

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