Well, admittedly, yes, I'm a little confused here....I don't run video files, just my Bandcamp music files in Windows Media Player. I just went to one of my collections, LEFT-clicked on a track and it opened instantly in WMP--sandboxed. I don't even run it (WMP) as a Forced program if it's already set as a default app: does one HAVE to? My Default box settings have very little allowed. The bare minimum, and the most simplicity. I have paid the price getting cute and fancy and making a plus here and there until things get all messed up. Right now, I could not ask for better, Sbie-wise. Very happy with this software atm.