You need a faster connection. My fiance loves to download anime and i would have the same problem, she would turn on bit torrent, and it would hog all my bandwidth. I upgraded from a 4k to a 8k connection, and now i can play my games while she downloads. Also keep in mind your running both processess off of one computer, and anydownloading program out there today is a system hog, are poorly designed, and just get the job done, they are not optimized in anyway. Truth of the matter is they dont make any money really, so they see no need to give you a better performing app then they do.