I haven't tried Windows 10 as a VM but I had a 32-bit version of 7 as a VM and successfully upgraded the VM to Windows 8.1 Pro during the time I was working from home in order to access workplace secure website. First you should run a .vbs script created in Notepad to establish the C.o.A. licence key. In terms of Software I recommend virt-manager over Virtual Box every time.
