after upgrading to Yosemite 10.10.2 and the last update 23/03/2014, wifi keeps dropping out. I have tried reconfiguring, tried changing "location" in wifi settings, tried rebooting router, upgraded firmware on router .. but still no joy. Now my 2.4ghz network wont work at all and the 5ghz one keeps dropping out and has the be manually reconnected every few minutes. Help! This is on our Macbook Pro. Our iphone, ipads and imac work fine!