connection

I am using Windows 8.1. For the last few days I cannot connect to the internet although I have an internet connection. At first I could connect using Brave, but not Chrome. Yesterday I could not connect with either chrome or Brave but I could connect using Firefox and today I couldn't connect...

We have 2 wall speakers that have 2 speaker wires as outputs (photos attached). What are the ways to connect them in order to listen to music? We have wireless speaker, wi-fi modem..

Lately I have encountered a problem I didn't have before. I used to always be able to connect to my friend's wifi whenever I was at his place but lately my laptop cannot even find it. My phone is able to pick it up but not my laptop. My laptop picks up mobile hotspots even and nearby neighbor...