I have both OneDrive and BitTorrent running on my Windows 7 laptop. It seems that BitTorrent can never be idle. It is constantly using about 2~3% of my cpu even though there is no change in any of my files. On the other hand, OneDive can be idle if you are not changing any files. So if you just let your computer be idle, the total CPU time of BitTorrent will still increase but the CPU time of OneDrive won't. Why BitTorrent need to use CPU constantly?