Hard drive passthrough with Windows 10 on drive

Is there anyway to have a VM boot from a drive that already has Windows 10 installed? Would I have to create a Windows VM first and then point the drive to it? Or is there an easier way of doing it? I'll eventually convert the physical to a VM down the road, just trying to get my Windows environment back up. Sorry for the noob question, just trying to learn more about Proxmox.

Thanks in advance!