I am running Fedora 27 (64 bit) on a Dell Optiplex (64), with all Virtualization options in bios turned on. I have downloaded and installed the latest version of Virtualbox. Everything is fine until I try to add a new machine. There are no 64 bit versions of the Centos I want to install. I have seen many threads on this, most resolved through bios, but nothing on what to do if bios Virt is activated.
Any help appreciated.