Ive been having this problem for 2 years now. Somedays it wouldnt connect and even if it did the speed would be at 0.20 mbps or so (20 mbps internet). I have another computer near me that uses the same wifi adapter and gets 20 mbit speed and never lags. I tried buying a new one (asus n14) but it didnt solve my problem. It often says "No Internet" when i connect to a network (or when im already connected playing a game or whatever it randomly says this). And when i run the problem solver when it happens it says something about network not having a proper ip configuration. flush dns and renewing ip also doesnt work. I dont remember if this was happening before the win10 upgrade.