What operating system are you using?

If your missing that "About" feature, seems like something is wrong, open and close windows media player, reboot the computer, see if you can get that feature back.

Windows Media Player 12 comes as part of Windows 7.

"In Step 4, you have choice to choose selected file type to play as default with Windows Media Player. You need to click on "Choose defaults for this program" and then select file types that you want to associate with Windows Media Player."

See link below,for more on above.

Here is a link that might be useful: file types that you want to associate with Windows Media Player.

Guess I wasn't clear about what I was asking before. I have a new pc with windows 7. On my old XP pc, I use third party software to manage and play mp3 music files. I had to go into WMP-11 tools>options>file types and deselect MP3 so WMP wouldn't try to play them. I just want to do the same on the new windows 7 machine.

The link Z provided is what your looking for. You just have to uncheck WMP's file association for MP3.

DA

OK - got it