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How to Fix Windows Update Connection Refused by Antivirus - Troubleshooting Windows Defender Certificate Sync Failure-Fix 'Could not get lock /var/lib/dpkg/lock' Error on Ubuntu/Debian

Updated 2026-06-13 12:52:19
How to Fix Windows Update Connection Refused by Antivirus - Troubleshooting Windows Defender Certificate Sync Failure-Fix 'Could not get lock /var/lib/dpkg/lock' Error on Ubuntu/Debian
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Operational follow-up

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  • Keep a rollback note if the workflow affects shared files or team settings.

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