KB5122878: What’s New in Windows 10 Build 19045.7725
Microsoft has released the Windows 10 KB5122878 update for September 2026 Patch Tuesday, available for ESU and LTSC systems. Advancing the operating system to Build 19045.7725, this cumulative patch addresses critical zero-day security vulnerabilities, fixes Remote Desktop audio bugs, resolves unexpected BitLocker recovery prompts, and expands updated Secure Boot certificate deployments across eligible devices.