purchasing a movie from apple tv has stopped working. I click on "movies" and it takes me back to the same screen instead of the movies available. I have updated software, unplugged the modem & apple tv box, & the tv; Netflix still works!

Welcome to the Apple Community.

1. First you should try logging out of your iTunes Store account (settings > iTunes Store > accounts) and then back in again.
2. If that doesn't help, try resetting the Apple TV (Settings > General > Reset > Reset all settings). You should also try restarting your router.
3. If both of the above don't help, you should try a restore (Settings > General > Reset > Restore).

I had the same exact issue and solution #2 worked for me. Thank you so much!!