I've included a link to a program called the "klite codec pack". It has virtually any codec you would ever need to play nearly any video format. On the install, the default options are ok. You should be able to click 'next, next, next, next, finish' (or something close to that).
http://fileforum.betanews.com/detail/KLi…
This is the codec pack I've been using for years, and no issues with it so far. Good luck, and I hope that I've helped
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