Fix Windows Security Center Version Mismatch Errors - How to Solve 502 Bad Gateway in Windows Terminal via Firewall-Resolve Error 0x8024401c Due to Proxy Authentication Failure

Updated 2026-06-14 01:00:23security-tools

Fix Windows Security Center Version Mismatch Errors - How to Solve 502 Bad Gateway in Windows Terminal via Firewall-Resolve Error 0x8024401c Due to Proxy Authentication Failure

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.