How to install Virtualbox on CentOS6x (64 Bit)

How to install Virtualbox on CentOS6x (64 Bit):

## RHEL 6.4/6.3/6.2/6.1/6.0/5.9/5.8/5.6 and CentOS 6.4/6.3/6.2/6.1/6.0/5.9/5.8/5.6 ##

cd /etc/yum.repos.d/
 wget http://download.virtualbox.org/virtualbox/rpm/rhel/virtualbox.repo


Install Dependencies:
 yum -y groupinstall Desktop
 

yum -y install qt qt-devel SDL-devel tigervnc-server gcc make kernel-devel dkms

uname -r

2.6.32-431.11.2.el6.x86_64                            //Kernel version

export KERN_DIR=/usr/src/kernels/2.6.32-431.11.2.el6.x86_64 

yum -y update

yum install VirtualBox-4.3 
<or>
wget http://download.virtualbox.org/virtualbox/4.3.8/VirtualBox-4.3-4.3.8_92456_el6-1.x86_64.rpm

rpm -ivh VirtualBox-4.3-4.3.8_92456_el6-1.x86_64.rpm

Installation Process:
warning: VirtualBox-4.3-4.3.8_92456_el6-1.x86_64.rpm: Header V4 DSA/SHA1 Signature, key ID 98ab5139: NOKEY
Preparing...                ########################################### [100%]
   1:VirtualBox-4.3         ########################################### [100%]

Creating group 'vboxusers'. VM users must be member of that group!

No precompiled module for this kernel found -- trying to build one. Messages
emitted during module compilation will be logged to /var/log/vbox-install.log.
Stopping VirtualBox kernel modules [  OK  ]
Uninstalling old VirtualBox DKMS kernel modules [  OK  ]
Trying to register the VirtualBox kernel modules using DKMS
 [  OK  ]
Starting VirtualBox kernel modules [  OK  ]


Note: By Defaull it works for 32 bit OS


Error (64 Bit PC): “This kernel requires an x86-64 CPU, but only detected an i686 CPU. Unable to boot – please use a kernel appropriate for your CPU”


For 64 bit OS (Enable virtulization):

Start or Restart PC:
Press a key (such as F2, F12, Delete, or Esc) Go to BIOS
--> Go to CPU information.
--> Enable Virtualization.
--> Save and exit

Then it will work for 64 bit OS.