Windows 11 users are encountering significant network disruptions following upgrades from version 23H2 to 25H2. This recurring issue, which has affected enterprise environments, involves the deletion of essential 802.1X authentication configurations, resulting in systems being unable to connect to wired networks without manual intervention.
Persistent Network Bug
Reports from the tech community, particularly on Reddit’s r/sysadmin, highlight this persistent bug that has troubled administrators since the transition from Windows 10 to 11. The problem, now observed in annual version upgrades, has notably impacted the 23H2-to-24H2 and 23H2-to-25H2 upgrade paths.
During these upgrades, critical files within the C:Windowsdot3svcPolicies directory, which store LAN authentication profiles, are inexplicably erased. This results in systems losing network access post-upgrade as they rely on these profiles for IEEE 802.1X authentication.
Impact on Enterprise Systems
The absence of network connectivity poses a severe challenge in enterprise settings. Without access to the network, systems are unable to receive necessary Group Policy updates to restore the 802.1X configurations. As a result, administrators must physically connect affected devices to unsecured network segments and manually execute commands to reapply the policies.
This issue has been documented since the Windows 10 22H2 to Windows 11 23H2 transition, with recent upgrades showing similar data loss patterns. The problem’s persistence through multiple Windows 11 updates has yet to receive a formal acknowledgment or fix from Microsoft.
Workarounds and Next Steps
In the absence of an official solution, system administrators have devised temporary workarounds. These include backing up the dot3svcPolicies folder before upgrades and restoring it afterward, connecting devices to non-802.1X ports for policy reapplication, and integrating profile restoration commands into the Windows setup process.
Despite these efforts, Microsoft has not issued a knowledge base article or hotfix regarding this issue. Administrators managing large networks are advised to review and adjust their upgrade procedures, ensuring critical backup steps are implemented before deploying future Windows updates.
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