Here’s a summary of the recent Windows 11 Firewall (with Advanced Security) issue and its resolution:
What happened?
- In Windows 11 24H2’s preview updates, some users noticed repeated error messages in the Windows Event Log, reading “Config Read Failed” and “More data is available”. These errors appeared after every device restart.
- The error entries came from Windows Firewall with Advanced Security, which alarmed users since it sounded like Microsoft’s own code was being flagged.
- Microsoft stated this is not really a Firewall malfunction.
- These errors are harmless, tied to a feature under development and not fully implemented yet.
- Microsoft reassures users the firewall and system are operating normally, and these log messages can be safely ignored.
- Microsoft released a permanent fix with the July 2025 Windows security update (KB5062553) and any later updates.
- Installing this update will resolve the logging issue and clear those repetitive Firewall error entries.
- The update also includes other improvements as usual.
If you see these error messages, there’s no action necessary except updating to at least the July 2025 Windows security update to make them go away. Your system security and firewall remain operational throughout.
Source:
You can read more details on this at Windows Central:
Windows Firewall flags Microsoft's own code as an error | Windows Central
Source: Windows Central Windows 11 Firewall with Advanced Security flags up errors in "under development" code — but it's nothing to worry about
