hi all - like a boner, i decided to upgrade to 10. now, when i try to play my old windows media files, i the following error. the file you are attempting to play has an extension that does not match the file format. playing the file may result in unexpected behavior. these are definitely wmv files. they have the little icon and i used to be able to play them. it also gave me some error about a missing codec, but i went to the website and downloaded all the current ones (at least i think i did). so what happened? any ideas are welcome! edit: it's also giving me another error now. Windows Media Player cannot play the file because a required codec is not installed on your computer. so how do i get the freakin' codec?