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Windows Defender - unable to start
I've tried everything listed in the various help pages, still unsuccessful. No other antivirus programs installed. Ran SFC scan, no errors found. Finally got to the app screen (after services.msc > Automatic > Restart), clicked on Update Definitions, started to update then aborted with error ox80004004. Don't see any way to uninstall and reinstall since Defender does not appear in the Programs list. Any ideas? Thanks!