Microsoft released a security update (KB5044284) for Windows 11 version 24H2. This update or updates released later have been installed correctly for those who installed Windows 11 24H2 via Windows Update or Media Creation Tool.

Microsoft advises reinstalling Windows 11 24H2 using media containing the December 2024 security update (released December 10) or later.

With the public launch of Windows version 24H2 last year came a security issue that was only 'resolved' this week. Those who installed Windows 11 from a media file using the October or November version of the software seemingly can't access any future security updates, and the solution is a fresh install of just the Windows OS.

If you are concerned about performance issues or bugs, block the new Windows 11 24H2 update using Group Policy editor or third-party tools.

Microsoft has shared a workaround for users affected by a known issue that blocks Windows security updates from deploying on some Windows 11 24H2 systems.

Microsoft previously offered details on installing Windows 11 on an unsupported PC That workaround has been removed from the support document that hosted it This could be to do with the release of the 24H2 update,

Microsoft’s first Windows 11 patch of 2025 “is turning out to be a disaster,” as another raft of incompatibility issues and unintended consequences seems to have hit the first Windows 11 patch of 2025. Fortunately, there’s a fix.