Q&A for How to Set up Ethernet

If you plug in an ethernet cable, your computer should automatically pick up on that. You can also disable WiFi by just selecting Off under WiFi (depending on your computer).

If you haven't changed it, it'll be stuck to the base of your router, or may be on a little slide out card.

Because it is a wired connection, any reasonable distance (under a mile) should not affect signal strength.

You can purchase and install an Ethernet card internally (or use a USB Ethernet adapter) or use a wireless connection.

Yes, you do, or you could use a wireless connection. If your PC does not have an Ethernet card you can use a card to do so.

Use the HDMI or another port (depending on what Roku you have) into an input port in your TV, and that will connect them together. And be sure to go to the correct input for the player and the TV to display correctly.

You don't need to do any extra setup. Just check the back of your router for a ethernet port. Plug a ethernet cable (this should have come with the router), into your pc or laptop. The PC might have a port. If not, then you can add a ethernet card yourself. For the laptop, you can get dongles to connect the ethernet with a existing port you have.