Why is VirtualBox only showing 32 bit guest versions on my 64 bit host OS?

Please check items by the following link first.

Check Item  

enable VT-d in BIOS

enable Hyper-V in Windows features

The Bottom Line

If VirtualBox is only showing 32 bit versions in the Version list make sure:

• Your Host OS is 64-bits
• Intel Virtualization Technology and VT-d are both enabled in the BIOS
• The Hyper-V platform is disabled in your Windows Feature list.

I hope this helps you – I don’t know if my situation will apply to your system configuration but I wanted to share.  Hopefully this little article will spare you the hours of mind numbing frustration that besieged me for the last few weeks.