Users who installed Windows 11 24H2 via removable media may not receive security updates if the installation media contains the October or November 2024 security updates. Microsoft advises using installation media that includes the December 2024 monthly security update or later to avoid this issue. Devices receiving updates through Windows Update or the Microsoft Update Catalog are not affected. Microsoft is working on a resolution for the installation media problem, which is one of several known issues with the Windows 11 update.