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Failed In-place upgrade from Windows Server 2022 to Windows Server 2025 (Hyper-V 2019 VM)

Bojan Zivkovic 486 Reputation points
2024-12-17T14:45:08.1766667+00:00

Hi, does anyone have same issue as I do - in-place upgrade from Windows Server 2022 to Windows Server 2025 on Hyper-V 2019 VM fails after 90% and first reboot. VM tries to boot and soon gets turned off. I have no issues with this upgrade path on vSphere 8 VM.

Fresh installation of Windows Server 2025 did not work either until 2024-11 CU for Windows Server 2019 was installed on Hyper-V 2019 hosts.

Windows Server
Windows Server
A family of Microsoft server operating systems that support enterprise-level management, data storage, applications, and communications.
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Hyper-V
Hyper-V
A Windows technology providing a hypervisor-based virtualization solution enabling customers to consolidate workloads onto a single server.
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  1. Ian Xue 38,721 Reputation points Microsoft Vendor
    2024-12-19T07:06:02.1866667+00:00

    Hi Bojan,

    Thanks for your post. Microsoft has confirmed this is a known issue with Windows Server 2025. For Workaround: Move non-boot disks to a separate NVME or SCSI controller.

    Reference: https://learn.microsoft.com/en-us/windows/release-health/status-windows-server-2025

    Best Regards,

    Ian Xue

    If the Answer is helpful, please click "Accept Answer" and upvote it.

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  2. Bojan Zivkovic 486 Reputation points
    2024-12-19T18:47:15.39+00:00

    Does this apply to Hyper-V VMs only and to both upgrade/fresh installations? Asking because my vSphere environment also uses iSCSI storage but not problems there.

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