Found a easy fix for the KB5065426 update that broke WIN 11 network mapping.

[Delly10 0]

I spent weeks messing with literally every REGEDIT, SMB setting, user account permissions.....ect after the KB5065426 update. Nothing.

I finally came across this ADMX file that rolls back the update and lets you disable it. Instant mapping after the reboot. Instructions below

1. Download first, then Run the OS version-specific KIR MSI from (Win11/ Win2025 below)

https://download.microsoft.com/download/c6c70455-59ce-4d47-b13c-56b99d0435f1/Windows%2011%2024H2%2c%20Windows%2011%2025H2%20and%20Windows%20Server%202025%20KB5065426%20250923_06201%20Known%20Issue%20Rollback.msi

Executing the MSI installs an ADMX file in the %systemroot%\policydefinitions folder that provides insight as to the OS Version-specific KIR Group Policy Setting to configure in local or domain group policy editors

1. In the local or domain policy editor, configure the KB5065426_20250923_06201 Known Issue Rollback group policy setting to disabled ( Supported on Windows 11, version 24H2, 25H2 and Windows Server 2025)

Disabled :If you disable this policy setting, the corresponding fixes with known issues will be disabled. (Use this to Rollback a known issue)

3.Reboot the machine