Windows 11 KB5033375 Breaks Wi-Fi: Common Issue to Get Fixed

Windows 11 KB5033375 update causes Wi-Fi connection failure? Try these solutions!

Recently, many Windows 11 users have encountered Wi-Fi connection interruption after installing the KB5033375 update. This article will provide a variety of solutions to help you restore your network connection.

KB5033375 is a mandatory security update for Windows 11 22H2 and 23H2 versions. While designed to fix the vulnerability, the update has caused widespread Wi-Fi connectivity issues. Many users have reported this issue, and it seems to stem from an earlier optional update KB5032288. At present, Microsoft has not responded to this official response.

The problem seems to affect the devices that use old Qualcomm wireless network cards, especially in some colleges and universities. Some observations suggest that the problem may be related to the corruption of the PEAP (Protected Extensible Authentication Protocol) settings in Windows caused by recent updates, especially Wi-Fi connections using PEAP. The discussion in the Microsoft Forum notes that Wi-Fi issues are particularly prominent when WPA2 enterprise SSID is used in conjunction with 802.11r. While disabling 802.11r can solve the connection problem, this is not an ideal solution because it may cause roaming problems.

How to resolve Wi-Fi connection issues caused by KB5033375 update?

Here are some solutions to try:

Method 1: Switch PEAP to EAP-TLS

A quick fix is ​​to switch authentication from PEAP to EAP-TLS, a non-password authentication method.

Method 2: Disable 802.11r on the affected SSID

Since the problem appears to stem from a four-way handshake, another option is to disable 802.11r on the affected SSID. But this may not be the best solution.

Method 3: Upgrade the wireless network card driver

Updating the wireless network card driver may also resolve Wi-Fi connectivity issues. Some users report this method works.

Method 4: Uninstall KB5033375 Update

If upgrading the wireless network card is not feasible, you can try uninstalling the KB5033375 update. You can uninstall it via the Settings app or from the command prompt.

Uninstall KB5033375 through the Settings app:

Step 1: Press Windows I to open the Settings app.

Step 2: Click Windows Update in the left panel and go to Update History > Uninstall Update .

Step 3: Locate the security update for Microsoft Windows (KB5033375) and click the Uninstall button next to it. Then, click Uninstall on the pop-up interface to confirm the operation.

Uninstall KB5033375 using the command prompt:

Step 1: Run the command prompt as administrator.

Step 2: Enter the command wusa /uninstall /kb:5033375 and press Enter to run.

Step 3: Windows Update Standalone Installer will display a message:

Do you want to uninstall the following Windows software update?

Security Update for Microsoft Windows (KB5033375)

Click the Yes button to start uninstalling.

Step 4: Click the Restart Now button to restart your computer and apply the changes.

If you do not want to install this update again, you can temporarily turn off Windows Update or block this update.

Recover data if necessary

If the file is deleted by mistake, you can use the data recovery software to restore your data.

Summarize

Microsoft should resolve the Wi-Fi connection problems caused by KB5033375 as soon as possible. Hope the above method can help you solve the problem.

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