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Windows 11 KB5079391 preview update introduces Smart App Control toggling and display reliability enhancements

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Microsoft released KB5079391, a non-security preview cumulative update for Windows 11 versions 24H2 and 25H2, introducing toggle functionality for Smart App Control without OS reinstallation and multiple display reliability improvements. The update, part of Microsoft’s end-of-month non-security preview schedule, enables users to enable or disable Smart App Control through Windows Security settings, expanding accessibility beyond clean installations. Additionally, it adds support for monitors reporting refresh rates exceeding 1000 Hz, native USB4 monitor connections, and improved HDR reliability. The optional update targets builds 26200.8116 for 25H2 and 26100.8116 for 24H2, addressing performance, stability, and user interface refinements.

Timeline

  1. 27.03.2026 11:20 1 articles · 2h ago

    Windows 11 KB5079391 preview update released with Smart App Control toggle and display improvements

    Microsoft released KB5079391, a non-security preview cumulative update for Windows 11 24H2 and 25H2, incrementing builds to 26200.8116 and 26100.8116 respectively. The update enables users to toggle Smart App Control on or off via Windows Security settings without reinstalling the OS, enhancing accessibility and manageability. Additionally, it introduces display reliability improvements, including native USB4 monitor connections, support for monitors reporting refresh rates above 1000 Hz, and enhanced HDR reliability. Performance and stability updates address x64 app execution on ARM64 devices in Windows RE and improve update download reliability.

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Information Snippets

  • KB5079391 is a non-security preview cumulative update for Windows 11 24H2 and 25H2, released as part of Microsoft’s monthly non-security preview schedule.

    First reported: 27.03.2026 11:20
    1 source, 1 article
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  • The update allows Smart App Control (SAC) to be toggled on or off via Windows Security > App & Browser Control > Smart App Control settings without requiring a clean OS installation.

    First reported: 27.03.2026 11:20
    1 source, 1 article
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  • Smart App Control blocks untrusted or potentially harmful applications when enabled.

    First reported: 27.03.2026 11:20
    1 source, 1 article
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  • KB5079391 introduces display reliability improvements, including support for monitors reporting refresh rates above 1000 Hz, native USB4 monitor connections, and enhanced HDR reliability.

    First reported: 27.03.2026 11:20
    1 source, 1 article
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  • The update targets Windows 11 25H2 devices to build 26200.8116 and 24H2 devices to build 26100.8116 upon installation.

    First reported: 27.03.2026 11:20
    1 source, 1 article
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  • Performance and stability improvements include smoother execution of x64 applications on ARM64 devices within Windows Recovery Environment (Windows RE) and enhanced reliability of update downloads from Settings > System > Advanced.

    First reported: 27.03.2026 11:20
    1 source, 1 article
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  • Windows Hello Fingerprint reliability is improved on certain devices, and the dialog boxes in Settings > Accounts > Other users are updated to modern Windows design with dark mode support, visibility dependent on domain-joined account status.

    First reported: 27.03.2026 11:20
    1 source, 1 article
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