Error 577: Windows cannot verify the digital signature for this file

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This post describes how to fix:

Windows could not start the Windows Defender Antivirus service on Local Computer.

Error 577: Windows cannot verify the digital signature for this file. A recent hardware or software change might have installed a file that is signed incorrectly or damaged, or that might be malicious software from an unknown source.

Error 577: Windows cannot verify the digital signature for this file. Screenshot

Cause

This error can occur when you try to start the Windows Defender Antivirus Service and Windows Defender has been turned off in group policy.

Resolution

Turn Windows Defender on in Group Policy.  For more information, see Related Posts.

Related Posts

- Your Virus & threat protection is managed by your organization

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