If people want to install the windows 8 Dev Preview in VirtualBox, you will need to use the settings specified here
You can download the developer preview HERE:
Note: It requires a clean install and that's why you should use a VM environment to test.
Initial Screen (Setup) Preview:

Start Screen Preview:

Lock Screen Preview:

to install Windows 8 in VirtualBox successfully. Here are the required settings:
General: OS Type: Other/Unknown
System: Base Memory=1536MB
Chipset=PIIX3
[X] Enable IO APIC
[ ] Enable EFI
[X] Enable absolute pointing device
Processor: 1
[ ] Enable PAE/NX
Acceleration
[X] Enable VT-X/AMD-V
[X] Enable Nested Paging
Display: Options don't matter - leave them as is
Storage: Remove SATA Controller
IDE Controller: Type PIIX2
IDE Primary Master: HDD 20GB
IDE Secondary Master: Windows 8 DVD
Audio: Intel HD Audio
Network: Leave as is
Serial Ports: Leave as is (none required)
USB: Leave as is
You can download the developer preview HERE:
Note: It requires a clean install and that's why you should use a VM environment to test.
Initial Screen (Setup) Preview:

Start Screen Preview:

Lock Screen Preview:

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