I never had a problem running win8 on vbox. in the system settings in vbox, for that vm, just make sure you set it to ICH9 and you should have no problems
Virtual DIsk Win 8 I have vmware workstation installed and could not run win8 x64 as "long mode is not supported". I never had problems running vmware x64 anything on AMD Platform, now that i got sucked into SandyBridge I can't even enable virtualization in BIOS. I just uninstalled vmware and it's time to learn vbox
I've been trying for a while to install windows 8(.iso file) on a Oracle VirtualBox, but failed. A black screen ending with "This 64-bit application couldn't load because your PC doesn't have a 64-bit processor" keeps poping up. But is Intel Core 2 Quad running a windows 7 64 bit with Sp1. I google it, people has same trouble but no fix found.
Windows 8 DP is working in a VirtualBox (VirtualBox 4.1.8r75467) and also works VirtualBox with Windows 8 as Host (HP Compaq nc6400 Windows8 DP x64 with Apps)
Julian, check your BIOS for Virtualization and enable it. I do not know for certain if it helps, but I know mine is enabled.