The latest patch on Windows 11 and Windows 10 causes Wi-Fi to stop working on certain laptop models. Uninstalling the respective update will solve the problem.

There is a serious bug in the latest security update (KB5033375) that Microsoft rolled out for Windows 11 and Windows 10 last week. Some users suddenly can no longer connect to a WiFi network or the stability of the connection is irregular. Microsoft has not yet officially responded, but seems to be aware of the problem.

According to the Microsoft forum, the error lies in networks that use 802.11r fast roamingStandard and devices with some Qualcomm WiFi adapters. Some users also complain about Wi-Fi issues with MediaTek chips. This suggests that this is a general issue that Microsoft can resolve itself with a future patch.

Since Microsoft itself has not yet officially confirmed the problem, there is a good chance that affected users will be stuck with the problem for a while. The only option today is to uninstall the specific security update. To do this, do the following:

• Click on that begin-Button
• Choose Institutions in the application list
• Go to Windows Update via the right bar
• Choose here History of updates
• Click below Uninstall updates
• Look for it in the list KB5033375
• Choose Undo installation

You can theoretically disable 802.11r on your laptop instead of uninstalling the security update, but we don’t recommend this. This technology allows the laptop to seamlessly connect from access point to access point as you move.

Now we have to wait for Microsoft to address the Wi-Fi issue in the next round of patches. Until then, you’re better off avoiding KB5033375. If an automatic reinstallation occurs in the meantime, repeat the steps mentioned above.