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windows 11 security update

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    KB5089549 May 2026 Windows 11 Update: Secure Boot Trust, BitLocker, and MSU Order

    Microsoft released the May 12, 2026 Windows 11 security update KB5089549 for versions 25H2 and 24H2, moving supported systems to OS builds 26200.8457 and 26100.8457 while also publishing standalone catalog packages that require ordered MSU handling for manual deployment. The update is not just...
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    • bitlocker recovery secure boot update deployment windows 11 security update
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    • Forum: Windows News
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    KB5083769 Blocks psmounterex.sys: Fix Backup Image Mount Failures

    Microsoft’s April 14, 2026 Windows 11 security update KB5083769 deliberately blocks vulnerable versions of the psmounterex.sys kernel driver, causing some third-party backup tools on Windows 11, Windows 10, and Windows Server to fail when mounting or managing backup images. The immediate fix is...
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    • backup image mounting code integrity enforcement psmounterex.sys driver blocklist windows 11 security update
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    • Forum: Windows News
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