Microsoft Warns of Windows 11 Media Bug Blocking Security Updates

Microsoft has acknowledged a significant issue affecting installations of Windows 11, version 24H2, using installation media that incorporates the October 2024 or November 2024 security updates. Devices installed via such media may become incapable of receiving further Windows security updates. This problem does not impact devices updated through Windows Update or the Microsoft Update Catalog.

The issue, first reported on December 24, 2024, arises when users install Windows 11 24H2 using media — such as USB drives or CDs — that includes updates released between October 8, 2024, and November 12, 2024. Devices installed with these specific updates are left in a compromised state and are unable to accept subsequent Windows security updates.

Microsoft clarified that the issue does not affect systems where these updates were applied through online methods such as Windows Update, highlighting that the problem lies specifically with the installation media.

A straightforward workaround to prevent this issue is to avoid using installation media created with the October or November 2024 updates. Instead, use media that includes the December 2024 security update, released on December 10, 2024, or later.

Microsoft assured users that it is actively working on a resolution and plans to release additional information as soon as it becomes available.

Windows 11 24H2 problems piling up

Windows 11 24H2 is the latest feature update to Microsoft’s flagship operating system, offering enhanced features and performance improvements. Released in 2024, this version is designed to be the most secure and user-friendly iteration of Windows to date. However, the release hasn’t been free of problems, causing usability issues for large segments of its user base.

Previously, Microsoft flagged a critical issue with the Auto HDR feature, a tool meant to enhance gaming visuals by converting SDR content to HDR. The bug caused games to display incorrect colors or freeze, forcing Microsoft to implement a compatibility hold for devices with Auto HDR enabled. Users were advised to disable the feature or refrain from manually updating to the new version until the problem was resolved.

Additionally, Ubisoft’s flagship games, including Assassin’s Creed Valhalla, Star Wars Outlaws, and Avatar: Frontiers of Pandora, faced severe performance issues on Windows 11 24H2. Players reported crashes, black screens, and reduced performance, prompting Microsoft to block updates on affected systems. Ubisoft and Microsoft released temporary hotfixes and later permanent fixes, but for some users, issues persisted.