I have two computers, TV and Voip telephone hard wire connected to a Verizon FIOS modem/router. I had a problem with one computer and contacted MS help for help. I allowed the tech access to my computer and he solved the problem (we had to reload Firefox), but in doing something else, the computer shut down and when I booted it up, I had no internet connection. The other computer is working fine.
The machine without internet is running Windows 10 - I believe it is up-to-date. I tried the internet troubleshooting; it failed.
Since I am not super computer savvy and since I have to use the second computer to get help and then move to the computer without internet to try various fixes, please provide whatever help you can with as explicit instructions as possible.