Microsoft has warned that its latest updates for Windows 11 might break key features, including the Start menu and Explorer. The issue primarily affects managed devices running Windows 11 24H2 or 25H2 with a monthly cumulative update from July 2025. XAML-dependent apps like these may crash or fail to load, leaving users with a black screen or unable to access essential functions. Microsoft is working on a resolution and has provided a workaround for admins, but this issue highlights the challenges of keeping Windows updates reliable and stable.
Source: https://www.theregister.com/2025/12/04/windows_11_start_explorer