Microsoft's recent Patch Tuesday update for Windows 11 has faced significant issues, particularly affecting users on versions 22H2 and 23H2. The installation of the May 13 update is failing on some machines, especially in virtual environments, leading to recovery mode entries and boot errors. Users are advised to avoid the update temporarily. The error message indicates a problem with the ACPI.sys file, which is crucial for managing hardware resources. Windows 11 Home and Pro users are likely unaffected, as virtual machines are typically used in enterprise settings. Microsoft has not provided the number of impacted users or a workaround beyond uninstalling the patches, but engineers are working on a resolution. This incident follows previous patching challenges faced by Microsoft this year, including an emergency update for Windows 10 and issues with Remote Desktop sessions in earlier updates.