Sysadmin shock as Windows Server 2025 installs itself after update labeling error

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Sysadmin shock as Windows Server 2025 installs itself after update labeling error
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Screens sprayed with coffee after techies find Microsoft's latest OS in unexpected places

Administrators are reporting unexpected appearances of Windows Server 2025 after what was published as a security update turned out to be a complete operating system upgrade.by a customer of web app security biz Heimdal. Arriving at the office on the morning of November 5, they found, to their horror, that every Windows Server 2022 system had either upgraded itself to Windows Server 2025 or was about to.

Sysadmins are cautious by nature, so an unplanned operating system upgrade could easily result in morning coffee being sprayed over a keyboard. Heimdal's services include patch management, and it relies on Microsoft to label patches accurately to ensure the correct update is applied to the correct software at the correct time. In this instance, what should have been a security update turned out to be Windows Server 2025.on Reddit:"Due to the limited initial footprint, identifying the root cause took some time.

As of last night, Heimdal estimated that the unexpected upgrade had affected 7 percent of customers – it said it had blocked KB5044284 across all server group policies. However, this is of little comfort to administrators finding themselves receiving an unexpected upgrade. Since rolling back to the previous configuration will present a challenge, affected users will be faced with finding out just how effective their backup strategy is or paying for the required license and dealing with all the changes that come with Windows Server 2025.

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