Hey, when you download Linux mint you may want to download the Linux mint 13, 32bit mate version.
I like this one because the mate desktop environment is more compatible with older PC's but still works fine with newer ones. Also the 32 bit version will work on both 32 and 64 bit CPUs. And lastly mint 13 is a long term support release, so you won't have to worry about it for a few years.
This is what I prefer, others may disagree.
Make sure and download it from the Linux mint website. I don't trust .iso files found by searching with the torrent sites.
So you have a .iso file.
In windows download imgburn to burn the disc. Or use whatever burning software you may already have. You can't just burn a DVD with the .iso file, you have to find the option that says "burn image" to do it.
When it's done, you should be able to boot with it.
This video does a decent job of showing you how to do it.http://m.youtube.com/#/watch?v=9Dy6OlXh ... Dy6OlXhWVk
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