28000.1643Pre-release
February 24, 2026—KB5077239 (OS Build 28000.1643) Preview
- May 26, 2026 — Updated commands (MSU strings) under Catalog.
- March 11, 2026 — Update: These features are included in the February 2026 non-security update (KB5077239).[Secure Boot] This update introduces two new PowerShell features to help you manage the ongoing Secure Boot key rollout. The Get-SecureBootUEFI cmdlet now supports the -Decoded option, which displays Secure Boot keys and certificates in a readable format. The Get-SecureBootSVN cmdlet lets you check the Secure Boot Security Version Number (SVN) of your device’s UEFI firmware and bootloader, and report whether the device follows the latest Secure Boot policy