Hyper-v is the name of a competing software product, not a PC feature. It's the same as suggesting that VirtualBox expects to see VMWare or KVM.bmcd77 wrote:I suspect the issue is that VirtualBox thinks it should use Hyper-V here which is not available.
The hardware feature required by all such platforms is called VT-x on Intel hosts, and AMD-v on AMD hosts. Hyper-v needs to be disabled because it grabs control of that processor feature and doesn't share.
If Hyper-v is enabled, or VT-x is disabled in the host BIOS, then you can't run 64bit VMs, nor VMs which use>1 CPU, or >= 4GB RAM, or any variant of Windows (32bit or 64bit) > Win8, and the last who knows how many Win server editions. These will not even appear as options in VirtualBox if your host doesn't support them.
Installing a 64bit OS into a 32bit template obviously won't work either.