Why is Xfire downloading files I did not ask to download?
Check the categories in your Files tab. You may have inadvertently subscribed to a channel which automatically delivers content via the Xfire download system. Simply right click on it and ‘Unsubscribe Channel’. Delete any unwanted files from the C:\Program Files\Xfire\downloads folder. Set your download options to ‘Disabled’ to avoid this in the future. The download throttle settings are found in Tools> Options> Files tab.