at work there is one wireless connection that seems to have given up the ghost in recognising this computer. It was intermittent before, connecting but often not getting internet access, requiring disconnection and re-connection. Now it appears it just doesn't work and often claims that security settings don't match.
This is not the case, as the password and type of security hasn't changed. If I plug in via LAN cord it nearly always works and there is no security mismatch.
The computer doesn't have a problem with wifi at home or elsewhere and others (and my phone) find the problematic wifi connection fine.
Is there a reason for it getting the knickers in a knot? It is a pain to be tied to the desk.
I did some playing with DNS settings etc, but I don't know enough to diagnose really.