Windows 11 PCs Fail to Shut Down After January Security Update

Microsoft’s January 13, 2026, security update for Windows 11 has triggered a frustrating bug: affected PCs refuse to shut down or hibernate, instead restarting. The issue is caused by KB5073455, which targets OS Build 22621.6491 on Windows 11 version 23H2. It was first reported on January 15 and arises from interference with Secure Launch, a […]

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