March 9, 2021—KB5000851 (Security-only update)

March 9, 2021—KB5000851 Security-only update Important: Verify that you have installed the required updates listed in the How to get this update section before installing this update. Important: For information about the various types of Windows updates, such as critical, security, driver, servic...

March 9, 2021—Hotpatch KB5001080 (OS Build 17784.1588)

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February 9, 2021—KB4601363 (Security-only update)

February 9, 2021—KB4601363 Security-only update IMPORTANT Verify that you have installed the required updates listed in the How to get this update section before installing this update.Customers who have purchased the Extended Security Update ESU for on-premises versions of this OS must follow th...

February 9, 2021—KB4601349 (Security-only update)

February 9, 2021—KB4601349 Security-only update IMPORTANT Windows 8.1 and Windows Server 2012 R2 have reached the end of mainstream support and are now in extended support. Starting in July 2020, there will no longer be optional, non-security releases known as "C" releases for this operating...