I wasn't even aware that this existed. 353 reviews on amazon and it's 4 and a half stars, damn not bad! So all I do is plug it into a free socket, then connect the Ethernet cable? That's brilliant. Thank you for the suggestion!
Thats pretty much it, one plugged in next to your router and connected to that, one plugged in near your PC and connected to that, then push the button and its a wired network through your houses power lines.