id	summary	reporter	owner	description	type	status	component	version	resolution	keywords	cc	guest	host
11704	Enabling Execute Disable Bit Makes VirtualBox not detect Intel Hardware Assisted Virtualization	freshprinze		"**My System Configuration**

- MB: Asus P8Z77 V-Pro
- CPU: Intel Core i7 - 3770 @ 3.4Ghz
- OS: Windows 8 Pro (64 bit)

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I am trying to use Virtual Box to install Ubuntu 12.10. The Ubuntu installer failed to launch. The log mentioned that it failed to detect Hardware Assisted Virtualization (HAV). 

A look into the BIOS showed the following:

    Intel Virtualization Technology - Enabled[[BR]]
    Execute Disable Bit (XD) - Enabled

To give it a try I ""Disabled"" XD. 

After that Virtual Box detected that I have Virtualization ""Enabled"". And the install process went on.

Further I have Hyper-V enabled. I am not sure if these two technologies are conflicting."	defect	closed	other	VirtualBox 4.2.12	invalid	windows8		Linux	Windows