Ok, well, I've tried reinstalling, uninstalling and installing again, updating Windows Media Player, Reinstalling DirectX 9.

The only thing left I guess is finding out how to revert driver? Can anyone help me, link me, or something? I have the latest Nvidia GeForce driver, I think. If someone can link me to an old one, or a better one to use, or a keyword I can google or something?

Thanks!