My SP4 and SB can no longer use 2.4GHz networks. This started before todays updates so I don't think they are related. Also worked after the update last Tuesday. Checked to make sure the adapter was set to auto and not 5, rebooted router, tried release and renew of ip, looked to see if my router had done an auto update, rebooted both PC's....I am clueless. Since it's the same problem on both machines something had to change. Router is Linksys Max-Stream AC5400. Anyone have any ideas?