Windows8 Enterprise evaluation is not loading on Ubuntu 12.04 LTS VirtualBox(NX bit Disabled)

I have a Dell Insprion 1525 laptop loaded with Ubuntu 12.04 LTS.

My BIOS version is A16(10/16/2008).

Processor : Intel Core2 Duo

When I tried to load Windows8 Enterprise evaluation on the Virtualbox, I got following error.

Your PC needs to restart.
Please hold down the power button.
Error Code: 0x0000005D
Parameters:
0x03060F0D
0x756E6547
0x49656e69
0x6C65746E

I googled for a solution and found that Windows 8 requires NX bit enabled (XD in Intel architecture) hardware which is not enabled in my system. I found an option of "CPU XD support" under security tab. It is enabled by default. Still I am facing the same issue. Is this the compatibility issue of the host operating system? Any help would be highly appreciated.

You need VT. I had the same issue but on XP Host OS on a dell optiplex 760. But when I used VMWare instead of VBox it worked. You may want to try VMWare