So, I noticed that when I wanted to associate gifs with the photo viewer that the photo viewer was not selectable (as in, not displayed as a choice). We all know photo viewer in 7 is not an selectable executable program. I don't want to use a browser; that's dumb as hell. I'm not typing about specifically gif animations either. I like my gifs static.
I went to the internets to see what everyone had to say and saw many others had this unresolved problem.
I gave up trying to figure it out and just wanted to add paint.net as an option to open gifs with. After I did this, photo viewer was available to choose as the default gif viewer.
This is a bug, am I right? That silly Windows...