Originally Posted by sailpower
I am pretty much a novice with all this so have (at least) one question. When I connect to someone else’s wifi, is my computer visible to anyone on that same system?
I can think of major security concerns that could result.
Generally no unless you want it to be.
Make sure you have no file sharing set up, that you have up to date Internet security software running, & that the network you connect to is set on your PC as Public one (which most security packages will set by default).
For the record having used public WiFi networks throughout the Caribbean & east coast USA for seven years, I've never had any security issues. In the early days of WiFi I often used to see other users on shared networks, but this tends to be the exception nowadays.