Co-worker A was being funny and replaced co-worker B's wallpaper. It was a family photo and now can't be found. Needless to say co-worker B is not very happy. The photo does not show up in the display properties->desktop list where I've always seen them.

There is a zip file that looks to be where the photo came from but it extracts as a windows theme.

If this was originally installed as a theme and then replaced where would windows store it?
I'm fairly certain the photo wasn't deleted but setting the theme back doesn't bring the wallpaper back any ideas?

Do a search on the computer for all pictures. It should show up that way.