As soon as i turn on my MacBook Pro all other devices in my home loose internet connection.
Overall, When my Macbook Pro turns on and connects to my home wifi, all other devices (Smart TV, iPad, Dell laptop, Acer Netbook) loose internet connection. Sometimes internet is slow at other times it is zero. All these devices are not on all at one time. Even if only one device such as my Smart Tv is on and I turn my MacBook Pro on, My Smart TV will loose internet connection and most times just stop working, which would other times be okay.
It seems as if the level of wifi network ability (?) on my laptop is really high and all other devices just die out when my Macbook Pro turns on and is connected to my home wifi.
MacBook Pro (13-inch Mid 2012), OS X El Capitan (10.11.1)