I played for 8 hours while working yesterday with absolutely no issues. I randomly got the error "Final Fantasy: A Realm Reborn has stopped working". And now, every time I log in, click start, and choose my character, I get the same error.

I uninstalled the game, reinstalled it.
I uninstalled my video card drivers twice.
I changed my password twice.
I uninstalled the game again, and reinstalled. I logged on this morning, and then it crashed after about 20 minutes with the same error.

I'm at a loss.