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Applies to: Windows Server 2019 This security update includes fixes and quality improvements that are part of the following updates: January 13, 2026—KB5073723 (OS Build 17763.8273) January 17, 2026—KB5077795 (OS Build 17763.8280) Out-of-band January 24, 2026—KB5078131 (OS Build 17763.8281) Out-of-band The following is a summary of the issues that this update addresses when you install ...

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