Some users of Windows 11 have experienced a problem where their PCs reboot instead of shutting down after the Patch Tuesday security update KB5073455. This issue primarily affects devices with Secure Launch on Windows 11 version 23H2. Microsoft has confirmed this behavior, which disrupts the usual power-off sequence and can drain battery life for laptops and complicate remote management processes. An out-of-band update, KB5077797, has been released to restore normal shutdown and hibernation functionalities for affected systems. Users can check for this update in Windows Update or download it from the Microsoft Update Catalog. To determine if they are affected, users should look for immediate restarts when selecting Shut Down or Hibernate and check if Secure Launch is enabled in System Information.