May 12, 2026—KB5087537 (OS Build 14393.9140)

May 12, 2026—KB5087537 OS Build 14393.9140 Windows Secure Boot certificate expirationImportant: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. Microsoft has been updating these certificates on consumer and non-managed business devices for the past...

May 12, 2026—KB5087470 (Monthly Rollup)

May 12, 2026—KB5087470 Monthly Rollup Important The installation of this Extended Security Update ESU might fail when you try to install it on an Azure Arc-enabled device that is running Windows Server 2012. For a successful installation, please make sure all Subset of endpoints for ESU only are...

October 14, 2025—KB5066780 (OS Build 25398.1913)

October 14, 2025—KB5066780 OS Build 25398.1913 Windows Secure Boot certificate expirationImportant: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. Microsoft has been updating these certificates on consumer and non-managed business devices for the pa...