So there is me, updating ESO, I alt+tab and do some other stuff, come back and see that im at 560% However, there seems to be no end! And the download bar is a bit out of place :P
We just want to make sure your game is SUPER patched. If you haven't already, go ahead and try closing and re-opening your launcher, @Severaice. This may resolve the issue.
Restarting my computer seems to have solved the issue. I like the idea of super patched! Just out of interest, what could have caused that, so I may prevent it in the future.
This issue happens very infrequently, so there's a good chance you won't see it again. However when you hop into the game, for sure submit a bug report using /bug so that our team can investigate further.