March 10, 2026—KB5078938 (OS Build 14393.8957)

March 10, 2026—KB5078938 OS Build 14393.8957 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 ...

March 10, 2026—KB5078885 (OS Builds 19045.7058 and 19044.7058)

March 10, 2026—KB5078885 OS Builds 19045.7058 and 19044.7058 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...

February 10, 2026—KB5075912 (OS Builds 19045.6937 and 19044.6937)

February 10, 2026—KB5075912 OS Builds 19045.6937 and 19044.6937 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...

January 24, 2026—KB5078129 (OS Builds 19045.6812 and 19044.6812) Out-of-band

January 24, 2026—KB5078129 OS Builds 19045.6812 and 19044.6812 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...

January 24, 2026—KB5078131 (OS Build 17763.8281) Out-of-band

January 24, 2026—KB5078131 OS Build 17763.8281 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 boot securely i...

January 17, 2026—KB5077796 (OS Builds 19045.6811 and 19044.6811) Out-of-band

January 17, 2026—KB5077796 OS Builds 19045.6811 and 19044.6811 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...

January 13, 2026—KB5073723 (OS Build 17763.8276)

January 13, 2026—KB5073723 OS Build 17763.8276 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 update...

January 13, 2026—KB5073724 (OS Builds 19045.6809 and 19044.6809)

January 13, 2026—KB5073724 OS Builds 19045.6809 and 19044.6809 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 secure...

January 13, 2026—KB5073455 (OS Build 22631.6491)

January 13, 2026—KB5073455 OS Build 22631.6491 ​​​​​This cumulative update for Windows 11, version 23H2 KB5073455, 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...

December 18, 2025—KB5074975 (OS Build 17763.8148) Out-of-band

December 18, 2025—KB5074975 OS Build 17763.8148 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 boot securely ...

December 9, 2025—KB5071543 (OS Build 14393.8688)

December 9, 2025—KB5071543 OS Build 14393.8688 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 update...

December 9, 2025—KB5071546 (OS Builds 19045.6691 and 19044.6691)

December 9, 2025—KB5071546 OS Builds 19045.6691 and 19044.6691 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 secure...

October 14, 2025—KB5066836 (OS Build 14393.8519)

October 14, 2025—KB5066836 OS Build 14393.8519 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 update...

November 11, 2025—KB5068791 (OS Build 17763.8027)

November 11, 2025—KB5068791 OS Build 17763.8027 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 updat...

September 9, 2025—KB5065429 (OS Builds 19044.6332 and 19045.6332)

September 9, 2025—KB5065429 OS Builds 19044.6332 and 19045.6332 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...

September 9, 2025—KB5065428 (OS Build 17763.7792)

September 9, 2025—KB5065428 OS Build 17763.7792 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 updat...

September 9, 2025—KB5065427 (OS Build 14393.8422)

September 9, 2025—KB5065427 OS Build 14393.8422 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 updat...

August 26, 2025—KB5063842 (OS Build 19045.6282) Preview

August 26, 2025—KB5063842 OS Build 19045.6282 Preview 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...

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...