Installing Windows Server 2012 on Virtualbox

I have used VirtualBox 4.2.12 to install Windows Server 2008 32-bit edition, and it installed fine.

However, when I try to install Windows Server 2012 64-bit edition on my laptop, it comes up with an error, however on my desktop it is fine!

I have allocated 2GB RAM and 64GB disk space.

My laptop has 4GB RAM and 320GB disk space.

This is the message I get after the progress bar:

Error Code: 0x0000001e

The computer needs to restart

Parameters:

0xFFFFFFFF00000005

0xFFFFF802C2970E0F

0x000000000000000

0xFFFFFFFFFFFFFFFF

I have tried:

Updating the BIOS

Updating the graphics drivers

Uninstalling VirtualBox, and reinstalling VBox and the VM with UAC turned off

It is an AMD Athlon x2 dual core L310.