Microsoft has released the Windows Server vNext Preview Build 29621, featuring enhancements like Trusted Launch for virtual machines, NVMe-over-Fabrics storage support, and automatic boot failure remediation through Quick Machine Recovery. Users are required to perform a clean installation from the baseline build 29531 and should address a critical TLS race condition before deploying in lab environments. The preview will remain active until September 15, 2026, allowing users to provide feedback via the Windows Feedback Hub. Additionally, the update introduces ReFS boot capabilities while highlighting that older preview builds are unsupported and emphasizing the need for careful configuration

Windows Server vNext Preview Build 29621 Now Available

Microsoft has released Windows Server vNext Preview Build 29621, introducing hardware-rooted security via Trusted Launch for virtual machines and native NVMe-over-Fabrics storage support. The update also enables automatic boot failure remediation with Quick Machine Recovery and allows the operating system to boot directly from a ReFS volume. Microsoft mandates a clean installation from baseline build 29531 onward, warning users to patch a critical TLS race condition before deploying in lab environments. The preview environment remains active until September 15, 2026, with feedback collected through the official Windows Feedback Hub and Microsoft Tech Communities.

Windows Server vNext Preview Build 29621 Now Available @ NT Compatible