[German]A small addendum for Windows 11 users. This week I reported on a problem that prevents Windows 11 clients with certain chips from accessing Wi-Fi access in connection with (WPA2 Enterprise Wireless). As of December 19, 2023, Microsoft has confirmed the bug and is rolling back the affected fix from Windows 11 updates via KIR. Here is some information about this bug and the rollback.
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Bug prevents Wi-Fi access
It's an unpleasant surprise that threatens users of Windows 11 22H2-23H2. If the cumulative security update KB5033375 from December 2023 is installed, there may be problems with Wi-Fi access. There have been reports that WPA2 Enterprise Wireless is broken due to the update and that Wi-Fi connections can no longer be established.
Various universities warned against installing the update and recommended that affected users uninstall it. I had reported the known details on December 18, 2023 in the blog post Windows 11 update KB5033375 can prevent Wi-Fi access (WPA2 Enterprise Wireless). At that time, Microsoft had not yet documented anything about the problem. Now readers pointed out to me yesterday here and here (thanks for that) that Microsoft has rolled otu a fix.
Microsoft rolled out a KIR fix
Microsoft responded on December 19, 2023 and posted the entry Microsoft received reports about issues connecting to Wi-Fi networks on its Windows Release Health page in the Known Issues. It states that Microsoft has received reports of an issue where some Wi-Fi adapters may not connect to some networks after installing KB5032288.
Confirmation of the problem
In the post, Microsoft confirms that this problem is caused by the updates KB5032288 (preview from December 4, 2023) and KB5033375 (security update from December 12, 2023). These are exactly the updates I mentioned in my blog post linked above. The issue is more likely to affect scenarios where an attempt is made to connect to a corporate, educational or public Wi-Fi network with 802.1x authentication.
This issue is unlikely to occur on home networks, Microsoft writes, which is consistent with my findings above. Clients with Windows 11 version 22H2 and 23H2 are affected.
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Rollback via KIR
Microsoft has opted for a quick solution and is rolling back the relevant fix that is causing the error via Known Issue Rollback (KIR). Users on unmanaged systems do not need to do anything as the fix will be rolled out automatically. However, it can take up to 24 hours for the fix to be automatically rolled out to consumer devices and unmanaged corporate devices. This should be the case by now. Restarting the Windows client can help the fix to be applied to the device faster.
For systems in companies that are managed centrally by administrators, this group of people must take explicit action for affected devices. To use the KIR solution, a special group policy must be installed.
Download for Windows 11, versions 23H2 and 22H2 – Windows 11 22H2 KB5032288 231029_032011 Known Issue Rollback
The above MSI installation file must be downloaded and then installed. Then the relevant group policy can be found under:
Computer Configuration – Administrative Templates – Name of the GPO (Windows 11 22H2 KB5032288 231029_032011 Known Issue Rollback)
in order to take effect. The device must then be restarted for the group policy to be applied. Instructions for using the GPO can be found under How to use Group Policy to deploy a Known Issue Rollback.
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Windows 11 23H2/22H2: Preview Update KB5032288 (December 04, 2023)
Patchday: Windows 11/Server 2022 updates (December 12, 2023)
Windows 11 update KB5033375 can prevent Wi-Fi access (WPA2 Enterprise Wireless)
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Mine quits just like the last one at about 35%.
should be resolved in the Jan 2024 or later updates like KB5034123 & KB5034204:
https://learn.microsoft.com/en-us/windows/release-health/status-windows-11-22h2#3227msgdesc