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Microsoft and Oracle have found a compatibility issue between VirtualBox and Windows 11. When Hyper-V or Windows Hypervisor is installed, you might be unable to start virtual machines (VMs) and you might receive the message.
To safeguard your upgrade experience, we have applied a compatibility hold on these devices from installing or being offered Windows 11.
To mitigate the safeguard, you have to remove Hyper-V or Windows Hypervisor temporarily until this issue is fixed with an update Oracle plans to release in October 2021. You can check Oracle’s progress by monitoring their ticket #20536.
If you no longer use VirtualBox, uninstalling it should also mitigate the safeguard. Please note, if there are no other safeguards that affect your device, it can take up to 48 hours before the upgrade to Windows 11 is offered.
Oracle has resolved this issue in VirtualBox 6.1.28 and later versions. To remove the safeguard hold on your device, you will need to update to VirtualBox 6.1.28 or a later version. Please note, if there are no other safeguards that affect your device, it can take up to 48 hours before the update to Windows 11, version 21H2 is offered.
Important If you do not have VirtualBox installed but are receiving this safeguard hold, you might have an application that is based on VirtualBox, or which has bundled VirtualBox within their installation. If you have any applications that use or create VMs or system images, you might need to update or uninstall them to remove this safeguard hold.