I was hoping that I would be able to use 64 bit Ubuntu and Centos as virtual machines in Sun’s free VirtualBox software on my desktop PC that has an Intel Core 2 Duo processor – after all it is 64 bit. But I’m only running 32 bit Vista.
This shouldn’t have been a problem with VirtualBox.
However, it turns out that a small selection of Core 2 Duo processors aren’t able to do this. The processor needs to have hardware virtualization support, which Intel has termed VT-x or ‘Intel Virtualization Technology’.
Anyway, I’m unlucky as the E4300 is one of the very few that don’t support this feature, so I can’t run the 64 bit versions.