Computer sees the router but there is no connection

over 50 said:

Computer sees the router but there is no connection - ran diagnostic ... Troubleshooting says 'One or more network protocols are missing on this computer'
This is a new computer, first set up. I am over 50. I have a satellite modem connected to a router. This setup has always provided wifi. I cannot get online when cable is run from modem to the router. I can only get internet if I plug cable directly into computer = no wifi for other devices.
How do I get these 'network protocols?'
Service providers ran tests, said hardware is working.

Hi over 50 and welcome to Tenforums.
If you get Internet when you connect with an ethernet cable directly to your satellite modem, it sounds to me that your router is the problem. If you run a cable from modem to router and no wifi is broadcasting (you can check for wifi with a phone or tablet), then the router is the problem: either it has failed, or it needs to be setup. How old is the router? I have found that usually, when a router is starting to fail, the wifi is the first thing to go.

If you connect a cable from the router to the new computer, do you get internet?

It's quite possible that a factory reset of the router may allow you to re-set it up, and get it working, but if it's failing, it won't last long and the wifi will go out again.