Recently, users of Windows 10 and 11 operating systems have been experiencing serious problems with their Wi-Fi connections. The issue seems to be linked to a security update released by Microsoft on December 12, identified as KB5033375. This update, originally presented as KB5032288 on December 4, included several improvements.
The problem has been widely discussed on various internet platforms, including social networks and Microsoft Forums. It appears that the malfunctions primarily affect networks using the fast roaming standard 802.11r, and devices with Wi-Fi adapters from Qualcomm.
Despite reports suggesting that Microsoft is aware of the issue, the company has not made an official statement yet. However, several organizations have advised affected users to temporarily remove the KB5033375 update as a potential solution. One user reported that disabling 802.11r helped restore their connection.
Unfortunately, neither of these solutions is ideal. Removing the KB5033375 update would leave users vulnerable to other security threats, as it includes important protection system enhancements. Disabling 802.11r would cause inconvenience for those who frequently move, as this standard enables continuous wireless network connection.
The problems seem to be linked to Windows software rather than hardware, affecting not only Qualcomm but also MediaTek and other equipment. Microsoft has previously encountered similar Wi-Fi-related issues, releasing urgent updates in 2021 for devices failing to connect to WPA3-protected networks and in 2022 for disrupted Wi-Fi hotspots.
Last week, Brunel University warned its students that personal laptops running Windows 10 or 11 could also be affected by the Wi-Fi problem. The university recommended removing the problematic update for those requiring Wi-Fi access on campus, while clarifying that university devices were not impacted.