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The Register - Software

Microsoft probes Windows 11 boot failures tied to January security updates

Some machines are failing to start after security updates, prompting yet another Microsoft investigation


Microsoft is investigating reports that its January 2026 security updates are leaving some Windows 11 machines stuck in a boot loop, adding another entry to this month's bumper post Patch Tuesday borkage list.


Published: 2026-01-26T12:13:08











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