Windows Defender won't update virus definition

  • Thread starter Thread starter lizzylm15
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lizzylm15

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I received a Windows security alert saying that virus and threat protection definition is out of date. Clicking on the "update" button just turns endlessly. Tried a couple of different ways to manually update (Latest security intelligence updates for Microsoft Defender Antivirus and other Microsoft antimalware - Microsoft Security Intelligence); running the batch script to trigger an update returns an error ("ERROR: Signature Update failed with hr=80070652"), and running "mpam-fe.exe" does not seem to do anything. Any suggestions on what to do next? Thanks!

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