Windows 10: Wifi cannot connect even though signal is strong.

After I updated my window, my usual wifi connection is errored. I get a message when trying to connect, "Some information changed since the last time you connected. We need additional information to complete the connection". And asking to put the network security key. But I didn't do any changes to my router or network. So I put the wifi password but it doesn't connect at all. The strange thing is this problem won't happen when the laptop is in the room where the router is placed. It only happens when I try to connect the wifi from outside of that room even if the wifi signal is strong. But after the wifi is connected in that room, the connection won't be disconnected even if I move my laptop to other rooms. So every time I restart my laptop, the problem repeats again and I need to go back to the room where my router is placed.

I already reinstall/update my wifi adapter driver and restarted the network but the problem cannot be solved yet.

Please is there any way to solve this problem so that I don't need to do this tiresome process to connect the wifi.

:)

 

wifi signal fluctuates

My wifi signal strength was working good when i bought my lumia 640xl...bt since i upgraded to win10...the signal fluctuates even though on my pc and other devices at my home the signal strength is strong...please suggest a solution...thank you

 

WIFI signal

i would like to know if anyone can tell me if there is a way i cn see how strong my wifi signal is ? if it`s good,fair, bad

 

Can't connect to certain public WiFi.

I have a Lumia Windows Phone but can't connect to some well known public WiFi networks even though it's a very strong signal.

McDonalds, public transportation WiFi, airport..

Again, the signal is very strong but for me it says "no internet access".