Patch Tuesday update makes Windows PCs refuse to shut down • The Register

Microsoft's January Patch Tuesday update for Windows 11 23H2 has caused some PCs to refuse shutting down or hibernating due to a Secure Launch bug. Microsoft advises using the command 'shutdown /s /t 0' to force shutdown, and warns of potential battery drain. Additionally, some Outlook POP account profiles may hang or freeze after the update, with Microsoft still investigating the issue.