Internet would not work on my PC but was working fine on TV and tablet. I spent 2 days looking for a used PC or another solution. Had to do it by casting my tablet to the TV and using its browser. It seemed like the PC's ethernet had just gone bad from age (its 8 years old). I remembered this forum, came here and did a search. I found the answer in the 3rd old thread I read. The answer was the socket reset command - netsh winsock reset. I did that, rebooted, and it was working. I still can't believe it was that simple.
Thank you to BleepingComputer.com for doing what you do.