May 12, 2026—KB5087544 (OS Builds 19045.7291 and 19044.7291)

May 12, 2026—KB5087544 OS Builds 19045.7291 and 19044.7291 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 device...