Fix 'Port Already in Use' Error with Windows Defender Firewall - Fix Windows Security Not Starting Due to Third-Party Antivirus-How to Fix Task Scheduler Token Expired Without Password

Updated 2026-06-14 05:50:18cloud-software

Fix 'Port Already in Use' Error with Windows Defender Firewall - Fix Windows Security Not Starting Due to Third-Party Antivirus-How to Fix Task Scheduler Token Expired Without Password

Before changing system settings, save your work and note the exact error text so you can compare results after each step.

Extra verification checklist

Restart the affected app after changing permissions or configuration files.
Test the same workflow in a clean browser profile or a temporary user account.
Compare the result on another network if the error may be connection related.