"seem to suggest I need to hook the router/modem to one of the pcs with an RJ45 ethernet cable"
Only to set up the router, you can remove the ethernet cable when that has been done and connect to the router wirelessly.
The Evil Within 2 review-in-progress
Photoshop CC 2018 released with new Curvature Pen and better brush tools
Camera tips to take better iPhone photos
Les meilleures applications de covoiturage 2017