According to customer reports, this month’s Patch Tuesday updates are breaking virtual machines on Hyper-V hosts, causing them to no longer boot and display “failed to start” errors.
According to complaints from Windows admins, the issue is triggered after installing KB5031361 and KB5031364 on Windows Server 2019 and Windows Server 2022 systems.
The following errors will be logged to the event viewer when trying to start a VM on an affected Hyper-V system:
- Failed to start virtual machine…
