Windows media player and most sounds aren't working

So that's the basic version of my problem, here's how it happened.

I was modding Morrowind and I added one too many which broke it, so I uninstalled it, thinking i could just re-install it. But then it didnt work, so i used uniblue registry booster to clean my system registry, and after that no music or sound (apart from the UAC bloop sound) worked.

What do I do guys? should I just format my drive and reinstall Windows? i could move all my important stuff to my mac :(

Come on, people help me out here :(

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