VirtualBox shows only 32 bit guest versions ― and how I fixed it

I recently purchased Lenovo Yoga 500 with 64-bit Windows 10. I installed Oracle VirtualBox on it but was surprised to find that I could only install 32-bit versions of OS on it. I found this article which suggested toggling Intel (R) Virtualization Technology and Intel (R) VT-d Feature settings in BIOS. But in my laptop I couldn't find this setting. Rather you will find a setting under Configuration tab called Intel Virtual Technology and enable it.

Reboot your system and now try to install OS in VirtualBox and it should now show both 32-bit and 64-bit versions of OS.

Installing Ubuntu on VirtualBox

I have a Windows 8 machine on which I will be installing Ubuntu 14.04 inside Oracle VM VirtualBox. First download VirtualBox and install it. For this example I am using 4.3.12. Download the image file for Ubuntu.

Once you have installed VirtualBox open it and click on "New" on the toolbar to begin the process of creating a new virtual machine.

Give a name to your virtual machine and select which OS you would be installing in it and click on "Next".

Sharing folders between Windows (host) and Ubuntu (guest) in VirtualBox

I have Windows 8 installed with Ubuntu 12.04 in Oracle VM VirtualBox and quite a few times I want to share files between them. For that, first you need to install VirtualBox Guest Additions for Linux. Guest additions consist of device drivers and system applications that optimize the guest operating system for better performance and usability.

To install Guest Additions go to Ubuntu Launcher and you would see VBOXADDITIONS_X.X.X_XXXX mounted.