25H2 upgrade issue causing WiFi availability disappear

Hello Brandon, I’m Henry, and I’d like to share a thought on your issue.

It looks like the problem is almost certainly a driver failure during the upgrade. The best move is to head to your PC manufacturer’s support site (Dell, HP, Lenovo, etc.) and grab the latest Wi‑Fi driver that matches your model and the new Windows version—don’t rely on Windows Update for this.

To confirm the fix, try it on one test machine: upgrade it to 25H2, let the Wi‑Fi fail, then manually install the driver you downloaded. After a reboot, the Wi‑Fi should be back, proving that the driver is the right solution.

I hope this information and these keywords help point you in the right direction for your research. Let me know how it goes, and if this answer helps, feel free to hit “Accept Answer” so others can benefit too

Hi Brandon,

If Wi-Fi disappears after upgrading to Windows 11 version 25H2, the issue is usually caused by incompatible or outdated wireless drivers rather than the OS itself. During feature upgrades, Windows may replace the OEM driver with a generic one, which can cause the Wi-Fi adapter to stop appearing in Device Manager after reboot. The recommended fix from Microsoft is to deploy the latest Wi-Fi driver directly from the device manufacturer (Intel, Realtek, Dell, HP, Lenovo, etc.) and push it through your management tool before or immediately after the upgrade. In managed environments, this is typically handled using **Microsoft Configuration Manager or driver update policies so the correct driver overrides the generic one installed during the feature update. If the adapter still disappears, check C:\Windows\INF\setupapi.dev.log and Event Viewer under Windows Logs > System for driver initialization failures, which will identify the exact driver that must be updated or replaced.

I hope it's helpful to you. If it is, please give it a thump up or accept the answer, very much appreciate it :)

Harry.

Wi‑Fi disappearing after upgrading to Windows 11, version 25H2 matches known issues where updates can break network connectivity and where fixes are delivered via Known Issue Rollback (KIR) and special Group Policies for managed (domain‑joined) devices.

For an AD/domain‑joined environment, the supported approach is:

1. Confirm whether this is a known KIR‑covered issue
   Check the Windows 11, version 25H2 release health and update history pages for known networking issues. When Microsoft confirms a regression, it is typically mitigated via KIR plus a downloadable Group Policy template (MSI) for enterprise devices.
2. Deploy the KIR Group Policy for affected builds
   For managed devices that already installed an affected update and then lost Wi‑Fi:
   • Download and install the appropriate KIR Group Policy MSI on a management machine (for example, for 24H2/Server 2025 the package is:
     Windows 11 24H2 and Windows Server 2025 KB5062660 250806_17201 Known Issue Rollback.msi).
   • After installing the MSI, the special policy appears under:
     Computer Configuration → Administrative Templates → [Group Policy name].
   • Configure the policy as documented in How to use Group Policy to deploy a Known Issue Rollback.
   • Link the GPO to the OUs containing the affected devices.
   • Restart client devices so the rollback policy is applied.
   The same KIR mechanism is used for Wi‑Fi issues previously seen on Windows 11 22H2/23H2 (KB5032288/KB5033375), where:
   • The issue affected mainly enterprise/education/public Wi‑Fi using 802.1X.
   • It was mitigated by installing and configuring the dedicated KIR Group Policy for those builds.
   • A full fix was later shipped in a cumulative update (KB5034123).
   For 25H2, follow the same pattern: when Microsoft publishes a KIR MSI and policy name for the specific 25H2 networking regression, deploy that GPO across the domain.
3. Ensure devices receive the servicing update that contains the permanent fix
   Once Microsoft ships the cumulative update that fully resolves the Wi‑Fi regression for 25H2, plan to:
   • Approve and deploy that cumulative update via your normal update management (WSUS/ConfigMgr/Intune).
   • After confirming the fix in a pilot group, roll it out broadly.
   • The KIR GPO can then be retired once all devices are on a fixed build.
4. If Wi‑Fi adapters are missing or disabled after upgrade
   On any individual device where Wi‑Fi is still unavailable even after KIR and latest cumulative updates:
   • In Device Manager, verify the wireless adapter is present and enabled under Network adapters. If disabled, enable it.
   • If the adapter is missing or shows a problem code, check the Problem number in the wireless network report and map it to the Device Manager error code.
   • Update or reinstall the Wi‑Fi driver from Windows Update and/or the OEM’s site, verifying Driver Version and Driver Date match the latest available.
   • If Windows does not detect the adapter at all, manually install the OEM driver.
5. If upgrades continue to fail or require rollback
   Where 25H2 installation itself fails with errors (for example 0x80070005, 0x800f081f, or other update failures), in‑place repair/reinstall of Windows 11 using the ISO and “keep personal files and apps” has been used successfully in similar 25H2 cases to restore update functionality before reattempting the upgrade.

Until the specific 25H2 Wi‑Fi regression is fully fixed in a cumulative update, the recommended enterprise path is:

• Keep affected devices on the last stable version where Wi‑Fi works, or
• Upgrade to 25H2 in a controlled pilot, then immediately apply the appropriate KIR Group Policy and latest cumulative updates, and
• Use Feedback Hub and official support channels to report that the 25H2 Wi‑Fi regression is impacting domain‑joined, 802.1X‑using devices so it is tracked and addressed.

References:

• Windows 11, version 25H2 update history
• Windows 11, version 25H2 known issues and notifications
• December 4, 2023—KB5032288 (OS Builds 22621.2792 and 22631.2792) Preview
• December 12, 2023—KB5033375 (OS Builds 22621.2861 and 22631.2861)
• Fix Wi-Fi connection issues in Windows