HowTo: Install VirtualBox on Fedora 18 x64

Step1:
  - download VirtualBox 4.2.6 for Linux hosts and VirtualBox 4.2.6 Oracle VM VirtualBox Extension Pack on this website https://www.virtualbox.org/wiki/Downloads
  - choose the AMD64 architecture for Fedora 18 ("Spherical Cow")

Step2:
  - open terminal and type the following
su -
yum update -y
reboot
**your computer will reboot

Step3:
su -
yum install -y dkms gcc
cd /home/**user**/Downloads
yum install -y VirtualBox-4.2-4.2.6_82870_fedora18-1.x86_64.rpm
/etc/init.d/vboxdrv setup
usermod -a -G vboxusers administrator

Step4:
  - open a new terminal and type the following
VirtualBox

Step5:
  - the Oracle VM VirtualBox Manager will pop-up
  - click File->Preferences
  - select Extensions
  - press the add package button 
  - find and select Oracle_VM_VirtualBox_Extension_Pack-4.2.6-82870.vbox-extpack 
  - press Install
  - read and understand the VirtualBox licence (click and drag the scrollbar up to the bottom to activate the "I Agree" button)
  - supply your root password
  - your done!