Solve VirtualBox can't operate in VMX root mode VirtualBox Error in Ubuntu

VirtualBox Shows "VirtualBox can't operate in VMX root mode" VERR_VMX_IN_VMX_ROOT_MODE error message

How to solve the problem

Open a Terminal and Type the following

$sudo modprobe -r kvm_intel

and restart the Virtual Machine

Virtualization made easy with ubuntu hardy

Virtualbox is a powerful virtualization tool in ubuntu hardy

Repository settings are same as my previous post (Java Installation)

sudu apt-get install virtualbox-ose virtualbox-ose-modules

After the installation is finished you’ll need to do just one of the following.

• Add yourself to the vboxdrv group (sudo usermod -G vboxusers -a username), and then re-login.
• change permissions on the vboxdrv device (sudo chmod 666 /dev/vboxdrv)

(if any failure try this commands before installing
1. sudo apt-get install build-essential linux-headers-`uname -r`
2.wget http://www.virtualbox.org/download/1.5.6/virtualbox_1.5.6-28266_Ubuntu_hardy_i386.deb
3.sudo dpkg -i virtualbox_1.5.6-28266_Ubuntu_hardy_i386.deb
4. sudo adduser $USER vboxusers)

It is worked in my core2 duo e8200 machine with 2GB RAM and INTEL G33 Motherboard
Linux kernel version 2.6.24-16

Its Great I have created virtual machine with 512 MB RAM and 8 GB hard disk , tested with my Ubuntu hardy live CD , it worked and with out any configuration I have connected to internet and browsed, and also tested open office very fast and no complications.