Windows Server 2025.26100.1742-oemret-x64fre-en... Jun 2026

Windows Server 2025.26100.1742-OEMRET-x64FRE-en...

Microsoft has been testing a “vNext” release internally, sometimes referred to as Windows Server 2025 or 2026 by enthusiasts. However, no public RTM (Release to Manufacturing) exists. The only legitimate way to test future server versions is via: Windows Server 2025.26100.1742-OEMRET-x64FRE-en...

The primary focus is bridging on-premises infrastructure with the cloud. It is the most Azure-integrated version yet. The OS is tightly integrated with , allowing you to manage on-premises, multi-cloud, and edge servers from a single control plane in Azure. It also includes hotpatching capabilities, which allows you to apply security updates without a reboot, minimizing downtime and simplifying maintenance. Windows Server 2025

Some users attempting to create bootable USB drives have encountered errors where the installation fails at approximately 9% or 75% completion, often due to corrupted media creation. It is recommended to use Microsoft's official documentation for creating bootable media using robocopy and the bootsect command to ensure integrity, or to use a high-quality third-party imaging tool to write the ISO. The only legitimate way to test future server

Let's break down exactly what that long string identifier means.

: The exact structural OS build number. Build 26100 serves as the stable, fundamental kernel baseline for the 24H2 branch. The extension .1742 indicates the inclusion of the definitive KB5043080 cumulative update package , marking the system's readiness for Release to Manufacturing (RTM) and General Availability (GA).