Systematic error VERR_VMX_IN_VMX_ROOT_MODE when starting VirtualBox

[tom_WR]

Host is Windows 7 64 bits running on a Core i5 laptop Guest is Fedora 14 64 bits

I have a systematic fail when launching the VM. Disabled VMware services running in parallel, but no change. Note that I entered the ticket for 4.2.0, but this is also true for the 4.1.x versions.

The image I'm using works fine on other hosts (Linux principally)

Error message abstract (will enter full logs in the ticket):

Failed to open a session for the virtual machine Fedora14-x64-KP.

VirtualBox can't operate in VMX root mode. Please close all other virtualization programs. (VERR_VMX_IN_VMX_ROOT_MODE).

Result Code: E_FAIL (0x80004005) Component: Console Interface: IConsole {1968b7d3-e3bf-4ceb-99e0-cb7c913317bb}

[Frank Mehnert]

Sounds to me like you either have another VMM running in parallel to VirtualBox or if you are using the Windows XP compatibility box which in fact does the same.

[tom_WR]

Hi franck,

I'm pretty sure this is about 'Windows XP compatibility box' Any suggestion for finding the faulty program ?

Note that I have vmware player installed on the same machine, but I have stopped all the related services and i still have the problem.

Thanks

Thomas

[tom_WR]

As I look into the bug database, I can find similar issue in #10789, with a dell latitude (as my laptop: latitude e6420, 8GB RAM, 500GB HD). Could id be somewhat linked to the Dell BIOS ?

[tom_WR]

frank, is there any way we can progress on this ?

[Frank Mehnert]

You could definitely try to update your host BIOS. If you are sure that you stopped all WinXP compatibility services then VirtualBox should normally run and a buggy BIOS could be certainly the reason.