Microsoft recently published KB5064489, an out-of-band (OOB) upgrade for Windows 11, version 24H2. An issue that stops some Azure virtual machines (VMs) from starting when Virtualization-Based Security (VBS) is enabled has been fixed with this release. The Redmond behemoth said that a secure kernel startup problem was the cause of the problem, which was affecting non-Trusted Launch General Enterprise (GE) virtual machines on older SKUs.
Once you've installed the KB5064489 update, your machine should be on OS Build 26100.4656. By pressing Windows + R, typing winver, and then hitting Enter, you may verify this.
Because of its urgent nature, Microsoft chose to release this OOB update outside of the usual Patch Tuesday timetable. Although critical, it's crucial to remember that it only impacted virtual machines (VMs) running the host's non-default VBS version 8.0, thus the actual number of affected VMs may be lower. Businesses that depend on these configurations to function flawlessly will benefit from the patch.
A servicing stack update (SSU), KB5063666, was also included in this release, moving that component to version 26100.4651. Although there is nothing particularly noteworthy to say about this update, it is significant because it makes it possible for essential Windows components to consistently receive and install upgrades in the future.
Microsoft concludes that there are no known problems with this update,Before performing the upgrade, it could be a good idea to backup any important data.
You can download this update as an offline package from the Microsoft Update Catalog if you have any offline computers that are unable to connect to Windows Update. You may obtain notes for every Windows 11 update up to this point, including the most recent Patch Tuesday update that was released only last week, by visiting the announcement on Microsoft Support.