Re: Origin downloaded 40gigs of nothing onto my computer?
This doesn't answer why or where the additional 40gb came from, but as far as (hopefully) freeing up the space:
Have you tried using an uninstalling software? There are a number of free programs available online that will do a much more thorough uninstall than most uninstallers/Windows do on their own. I don't really know which are better than others, but I personally use IOBit Uninstaller. Hopefully this will at least locate and clear up the 40gb so someone can pop in and answer things on the technical side for ya.