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Azure Virtual Machines
An Azure service that is used to provision Windows and Linux virtual machines.
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Hello ZTS,
The Sysprep error code dwRet = 0x139f typically indicates that pending Windows updates or reserved storage usage are interfering with the Sysprep process. Sysprep requires the system to be in a clean, update-free state, and any active update or servicing operation can block it.
Since the logs mention updates requiring a reboot, start by restarting the machine, as this can often clear pending update operations.
Next, open Windows Update and ensure that all updates are fully installed. If updates appear to be stuck, you can pause them temporarily by navigating to:
Settings > Windows Update > Pause updates
This may allow Sysprep to proceed without being blocked by active update processes.
If you have any further queries, do let us know.