How to install Windows Server 2008 R2 on Oracle VirtualBox?

I showed with this video,  how  to installing Oracle VirtualBox, and how to create virtual machine on VirtualBox. I installed Microsoft Windows 2008 R2 operating  system  on virtual machine. 

VirtualBox  is very useful for testing all Oracle products. Usually I  using Oracle VirtualBox for testing Oracle Data Guard, Oracle RAC and other technologies. 

Best  regards
Mahir M. Quluzade.