
Excuse me once you removed the window player (it is the one that reads music files and videos comes by default to install win) since you should read them even if you did not have any additional program, such as winamp etc, right click on the files and choose the option "open with" after the list that will show you choose the programs you use to open those files, if they do not show you the programs try reinstalling them.
If you already reinstall them, but nothing. It also happens to me with the doc. of word and photos. when I choose a program for example win media for music all the photos and doc files are changed. to the win icon. half. Another thing is that it shows me in all files type of RIGH FILE.
rare your case, humm uses the windown 7 installation disc (the version and bits are installed on your pc) or a pendrive and have windown repaired, try that and comment here a guide video. https://www.youtube.com/watch?v=PjOr06wEx0Q test and comments