I have used TP Link to connect my pc to router successfully for some years.

This has been disturbed by installation of a new router.

Now, when I left click on "Internet access" in MS windows I find two TP Link options (which surprises me!) and the router: FRITZIbox.  Which ought I to connect to?

If I select either of the TP Link alternatives I am asked for "the network security key" but I cannot find anything of that name. The router has a "network password" and each TPLink has a different "wireless password" but none of these appears to work.

Please help (gently) as I am out of my depth!