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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 is working on a resolution and is estimated to release a compatible version of VirtualBox in October 2021.
Note We recommend that you do not try to manually upgrade by using the Update now button or the Media Creation Tool until this issue is fixed.
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