VirtualBox Issue: "Create Virtual Machine" wizard only shows 32 bit guest versions in "Version" dropdown

Recently I have came across very strange problem while creating Virtual Machine(VM) using Oracle VM VirtualBox.I was planning to install the 64 bit CentOS as the Guest OS on my 64 bit Windows Host but the Version drop-down in the Create Virtual Machine wizard didn't have any 64 bit options. Through VirtualBox documentation, I have checked the details of supported Host OS & Guest OS and found that it also supports 64 bit Guest OS. Therefore it's a problem with my system configuration. 

In this "How To" guide, we would discuss how to resolve the above issue so that if you face the similar issue then you could also easily troubleshoot the issue.

VM creation using VirtualBox Issue: "FATAL: No bootable medium found! System halted."

Have you came across below error while trying to start your newly created Virtual Machine (VM) using Oracle VM VirtualBox :

The error states that : FATAL: No bootable medium found! System halted.

This error message tells us two things:

• No bootable medium found: we haven't specified the Guest OS for our Virtual Machine (VM) while configuring the VM system configurations. 
• System halted: in absence of an OS, how can any system start, that's why our VM system is halted.

This article is kind of How To Guide to show the steps with screenshots to fix the above issue.

VirtualBox Overview

Have you ever faced problem in understanding or confused about the terms like VirtualBox ,Virtual Machine. If yes, then this article would clarify all your doubts. Today we would discuss below topics:

What is VirtualBox?
Why one should use VirtualBox?