Windows 10 VM won't boot after changing machine type i440x -> Q35

[medicineman25]

Is there a proper way to handle this? Do I need to create a fresh VM?

When booting the VM, after having changed the machine type, the VM simply goes through a continuous reboot cycle and reporting that it cannot be fixed.

Here are the before settings:



The after has only a change to Machine from pci440fx-6.1 to pc-q35-6.1