KB5078740:Windows Server 2025 now supports newer server platfor

March 10, 2026—KB5078740 (OS Build 26100.32522)

Improvements
This security update contains fixes and quality improvements from KB5075899 (released February 10, 2026). The following summary outlines key issues addressed by this update. Also, included are available new features. The bold text within the brackets indicates the item or area of the change. ​​​​

• [Secure Boot] ​​​​​​​With this update, Windows quality updates include additional high confidence device targeting data, increasing coverage of devices eligible to automatically receive new Secure Boot certificates. This targeting is based primarily on client device diagnostic data; due to limited data, servers are unlikely to qualify, though not explicitly excluded. Devices receive new certificates only after demonstrating sufficient successful update signals, maintaining a controlled and phased rollout.
• [System services and reliability] Improved: Windows Server 2025 now supports newer server platforms that expose more hardware error reporting features, including systems with up to 64 Machine Check Architecture (MCA) banks. This update ensures Windows parses and configures all supported error sources, so hardware errors are reported and handled as expected on modern servers such as newer AMD EPYC‑based systems.