See if any of the solutions on the first 2 pages of https://www.google.com/search?q="Can't+connect+to+this+network" help. And, sorry, we're not responsible for any language used in the links.
My laptop won't connect to the wifi. I've been connecting to my house's wi-fi for months and it's the first time I try to connect to this other wi-fi in my father's house. All other devices (phones, tablets, ipods and another laptop) all connect to the modem whilst my computer says "Can't connectt to this network". It connects with an ethernet cable though. I'm so lost i tried so many options. Turning on/off modem and computer with or without ethernet. Tried to uninstall/reinstall/update network adapters. I don't know what to do. Please help. Also, I would appreciate it if you used a very easy language, I know 0 about this tech stuff. Thanks