Problem:
On my Windows 10 machine and after installing Docker, I was unable to start any of my Oracle VirtualBox VM machines, they all throw the same error: VERR_NEM_VM_CREATE_FAILED
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Solution:
I've uninstalled Docker first, then disabled "Virtual Machine Platform feature" from my Windows machine, restarted my machine, and then I managed to start my VirtualBox VMs without any issues.
From Run: optionalfeatures
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Untick "Virtual Machine Platform"
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Then restart your Windows machine.
