VirtualBox is a virtual software that can run separately operation system and softwares in it together, in this example you install linux on the windows or vice versa.
VirtualBox Open Source Software, or can be downloaded for free, this software can run on OS Windows XP / 2003 / Vista / Windows7 / XP64 / Vista64 / Windows7 64. You can download it at the link below.
File size 87.25MB
https://www.virtualbox.org/wiki/Downloads
