I have a solution for you......but your gonna have to part with WMP for the most part. I did, in fact I dont think I have even opened it for 6 months. Anyway, enough jokes, there just happens to be an all in one solution.
It's called the K-Lite Codec Pak. It comes with two media players, good ones, and all the codecs that you need for almost all of todays technology. It even has QuickTime and Real replacements, and all the files play through the one Media Player, (Media Player Classic). You can watch Movies using the other player if you choose, (BS Player) but you don't have to.
Here is the link for the download: K-Lite Mega Codec Pack
There are two other versions, but this one is the whole ball of wax, and no Crapware either. Keep in mind that this is a 34MB download.
Hope this helps,