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Windows 11 Security Update Causes Boot Failures for Some Users

First seen 25 Jan 2026, 21:53 UTC • Neowin

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Microsoft is investigating reports that the latest Windows 11 security update, released on January 13, 2026, is causing boot failures on affected PCs. Users are experiencing a black screen upon startup, rendering their devices unusable. The company has acknowledged the issue and is working on a resolution.

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Windows 11 Security Update Causes Boot Failures for Some Users

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