graeme_p - 10:15 am on Jul 30, 2013 (gmt 0)
Sorry, rematk about MS help page was incidental (because funny).
The question is whether JAB has a 64 bit Windows install. If not you need to enable hardware virtualistion (for the VM, and possibly in BIOS) and select a 64 bit OS. See [virtualbox.org ]
There are also bugs in some Linux kernels [virtualbox.org ]