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Fix Windows Defender SSL Certificate Errors from Antivirus Interference - Resolve Update Error 0x80070643 in Defender-Firefox Not Responding? Try a Profile Refresh

Updated 2026-06-13 14:37:41browser-issues
Fix Windows Defender SSL Certificate Errors from Antivirus Interference - Resolve Update Error 0x80070643 in Defender-Firefox Not Responding? Try a Profile Refresh
Likely symptom
Likely cause
Safe rollback

Verification route

  • Repeat the original action, not only a simplified test case.
  • Restart the app or reload the service after configuration changes.