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Windows Server Update Issues
October 19, 2023

Reading Time: 1 minute

Author: Craig Holt



Latest Windows Server Updates Causing Hyper-V VM Boot Issues

Microsoft has recently acknowledged a new issue affecting Windows Server 2022 and Windows Server 2019. The bug, caused by the October 2023 Patch Tuesday updates, results in virtual machines (VMs) running on Hyper-V hosts failing to start.


The Problem

The problem can occur after installing the KB5031361 and KB5031364 updates on Windows Server 2019 and Windows Server 2022 machines. Users who attempt to start a virtual machine on a Hyper-V system will see error messages in the event viewer.


The Impact

This issue is causing significant disruption, as it prevents the booting of virtual machines on Hyper-V hosts, displaying “failed to start” errors. This is particularly problematic for businesses relying on these virtual machines (typically servers) for their daily operations.


The Solution

Microsoft are currently investigating the problem and will provide additional information as soon as it’s available. In the meantime, it’s recommended to uninstall these updates to address the Hyper-V boot issues. The following KB numbers should be uninstalled:

  • KB5031364
  • KB5031361


Our Commitment to You

We understand that these issues can cause significant disruption to your business. That’s why we want to reassure our customers using our server monitoring services that we are aware of this issue, and we have taken steps to ensure that you will not receive these updates whilst they’re in this state. We are committed to providing you with a stable and reliable server environment.


If you’re not a customer of ours, speak to your IT team about these issues to see if they affect you. And, if you’re curious or want to chat about what you need, don’t hesitate to get in touch with us.




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