If you've never used Linux of UNIX, you'll likely be in for a bit of learning. If this is your first time installing Linux, don't try to dual boot with a windows operating system, it can be tricky and you might lose the ability to boot into windows if you set it up incorrectly.
EMC is a very capable CNC control program. The reason it's not more popular is the whole need to run Linux.
My name is Electric Nachos. Sorry to impose, but I am the ocean.
http://www.bryanpryor.com
(Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)