April 30, 2026—KB5083631 (OS Builds 26200.8328 and 26100.8328) Preview

April 30, 2026—KB5083631 OS Builds 26200.8328 and 26100.8328 Preview ​​​​This non-security update for Windows 11, version 25H2 and 24H2 KB5083631, includes production-quality improvements. To learn more about differences between security updates, optional non-security preview updates, out-of-band...

March 10, 2026—KB5078740 (OS Build 26100.32522)

March 10, 2026—KB5078740 OS Build 26100.32522 ​​​​​This cumulative update for Windows Server 2025 KB5078740, includes the latest security fixes and improvements, along with non-security updates from last month’s optional preview release. To learn more about differences between security updates,...

February 24, 2026—KB5077241 (OS Builds 26200.7922 and 26100.7922) Preview

February 24, 2026—KB5077241 OS Builds 26200.7922 and 26100.7922 Preview ​​​​​This non-security update for Windows 11, version 25H2 and 24H2 KB5077241, improves functionality, performance, and reliability. To learn more about differences between security updates, optional non-security preview...

KB5075902: Servicing stack update for Windows 10, version 1607 and Windows Server 2016: February 10, 2026

KB5075902: Servicing stack update for Windows 10, version 1607 and Windows Server 2016: February 10, 2026 Windows Secure Boot certificate expiration Important: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. This might affect the ability of certain...

December 9, 2025—Hotpatch KB5071413 (OS Build 20348.4467)

December 9, 2025—Hotpatch KB5071413 OS Build 20348.4467 This Hotpatch update for Windows Server 2022 KB5071413, improves functionality, performance, and reliability. To learn more about differences between security updates, optional non-security preview updates, out-of-band OOB updates, and...

December 9, 2025—KB5071542 (OS Build 25398.2025)

December 9, 2025—KB5071542 OS Build 25398.2025 This cumulative update for Windows Server, version 23H2 KB5071542, includes the latest security fixes and improvements, along with non-security updates from last month’s optional preview release. To learn more about differences between security...

November 11, 2025—Hotpatch KB5068966 (OS Build 26100.7092)

November 11, 2025—Hotpatch KB5068966 OS Build 26100.7092 ​​​​​​​This update applies to Windows Server 2025 Datacenter & Standard machines connected to Azure Arc. To learn more about differences between security updates, optional non-security preview updates, out-of-band OOB updates, and continuou...

KB5066794: Servicing stack update for Windows Server 2012 R2: October 14, 2025

KB5066794: Servicing stack update for Windows Server 2012 R2: October 14, 2025 Windows Secure Boot certificate expiration Important: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. This might affect the ability of certain personal and business device...

September 9, 2025—KB5065468 (Monthly Rollup)

September 9, 2025—KB5065468 Monthly Rollup Windows Secure Boot certificate expiration Important: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. This might affect the ability of certain personal and business devices to boot securely if not updated in...

KB5065767: Servicing stack update for Windows Server 2012 R2: September 9, 2025

KB5065767: Servicing stack update for Windows Server 2012 R2: September 9, 2025 Windows Secure Boot certificate expiration Important: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. This might affect the ability of certain personal and business devic...

July 8, 2025—KB5062619 (Security-only update)

July 8, 2025—KB5062619 Security-only update Windows Secure Boot certificate expiration Important: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. This might affect the ability of certain personal and business devices to boot securely if not updated i...

July 8, 2025—KB5062597 (Monthly Rollup)

July 8, 2025—KB5062597 Monthly Rollup Windows Secure Boot certificate expiration Important: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. This might affect the ability of certain personal and business devices to boot securely if not updated in time...

July 8, 2025—KB5062561 (OS Build 10240.21073)

July 8, 2025—KB5062561 OS Build 10240.21073 Windows Secure Boot certificate expiration Important: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. This might affect the ability of certain personal and business devices to boot securely if not updated i...

July 8, 2025—KB5062552 (OS Builds 22621.5624 and 22631.5624)

July 8, 2025—KB5062552 OS Builds 22621.5624 and 22631.5624 Windows Secure Boot certificate expiration Important: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. This might affect the ability of certain personal and business devices to boot securely i...

July 8, 2025—KB5062632 (Monthly Rollup)

July 8, 2025—KB5062632 Monthly Rollup Windows Secure Boot certificate expiration Important: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. This might affect the ability of certain personal and business devices to boot securely if not updated in time...

July 8, 2025—KB5062557 (OS Build 17763.7558)

July 8, 2025—KB5062557 OS Build 17763.7558 Windows Secure Boot certificate expiration Important: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. This might affect the ability of certain personal and business devices to boot securely if not updated in...

July 8, 2025—KB5062560 (OS Build 14393.8246)

July 8, 2025—KB5062560 OS Build 14393.8246 Windows Secure Boot certificate expiration Important: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. This might affect the ability of certain personal and business devices to boot securely if not updated in...

August 19, 2025—KB5066188 (OS Builds 19044.6218 and 19045.6218) Out-of-band

August 19, 2025—KB5066188 OS Builds 19044.6218 and 19045.6218 Out-of-band Windows Secure Boot certificate expiration Important: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. This might affect the ability of certain personal and business devices to...

August 19, 2025—KB5066189 (OS Builds 22621.5771 and 22631.5771) Out-of-band

August 19, 2025—KB5066189 OS Builds 22621.5771 and 22631.5771 Out-of-band Windows Secure Boot certificate expiration Important: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. This might affect the ability of certain personal and business devices to...

August 12, 2025—KB5063709 (OS Builds 19044.6216 and 19045.6216)

August 12, 2025—KB5063709 OS Builds 19044.6216 and 19045.6216 Windows Secure Boot certificate expiration Important: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. This might affect the ability of certain personal and business devices to boot securel...