AMD-V is not enabled in VirtualBox on AMD APU

First enable AMD-V in the BIOS. It depends on your BIOS, but it will look something like this (probably):

In VirtualBox click -> Settings -> System -> Acceleration and enable the checkboxes as shown below.

I had run into the very same problem and after spending like 2hrs I finally solved this. I am on a 32bit sys and my Bios does not have this Vizualization Technology option.

The problem happened to be VirtualBox related, I did this:

VirtualBox > System > Processor > change the number of processors from 2 to 1

Worked for me.