One of my system administrator had an virtual machine (of Win 7 OS) that we used as a testing OS.
Now if we need to have a fresh machine, she used to give that very quickly w/o installing the OS again. Somehow she used to have a saved .vhd or something and that she used to load into some software - Not sure how and what she used to do.
Do you have any idea. I know my question is very vague, hence let me know if I'm unclear about what I want to know.