Every time me or my brother downloads a game or a large file, it takes up all the internet completely and its unusable to anybody else connected to my wifi, it only happens on my brothers and I's windows computer but not on my dads imac or our phones, I can run about 120 mb/s on my computer and it takes up all the internet but on our Xbox I can average around 200-300 mb/s with no issue of it taking up the internet, do I just have bad internet or is there a fix to this?