Two computers are located right next to each other, both are connected to the internet (same internet connection name/channel) but one has an extremely bad connection such that I can barely visit a single website.
ping 192.168.1.1 for 110s results in 90% package loss for that one computer while the other one has 0% package loss.
An hour ago the bad connection did not manifest itself on that one computer. All of a sudden the connection deteriorated very badly. I didn't go near to the router nor anyone else (I was alone), I didn't make any changes to my connection either.
I don't understand how this is possible, if it was my ISP, you would expect that the connections of both computers would deteriorate to about the same extent, but that the connection of that one computer seems unaffected.
How is this possible?
Reference to myself
This is what MaQleod meant with adapter(= NIC).
Why did horatio mention the type of wireless connection frequency? Because if the computers both receive and emit EM waves of the same frequency, than they will strongly interfere.
Device driver (for network card)