virtualbox.org

I'm using the final version of VB 5.0 on a Win 8.1 host. Virtualization is turned on in BIOS.
When I try to create a 64-bit guest, the only options in the list are 32-bit. How can I create a 64-bit guest?
I had 64-bit guests on this machine before. I uninstalled the older version of VB, deleted all my old guests and did a fresh install of VB 5.0.

Thanks for your time!

Tom Lake

I finally figured out what happened! My son wanted to experiment with Hyper-V so he turned on that feature in Windows. When he was done experimenting, he forgot to turn it off again. Coincidentally, I wiped and reinstalled VB while Hyper-V was active. Of course there's no virtualization in VB! Hyper-V is using it, disabling it for all other apps.

Tom Lake