Windows 7 is creating some folk trouble as new CPUs and boards are no longer supported. So be sure of that issue.
I've setup powerline a lot so the basics is to test it with the one unit at the router and the new PC on the same outlet before you move away to other rooms.
I purchased the TP-LINK AV200 Nano Powerline Adapter Starter Kit so I could connect my desktop to our router on the other side of the house. Everything is hooked up properly and all of the lights on both adapters are on. The power light, the light indicating that it's paired with the other device, and the light indicating that it's hooked up to the computer or router. However, my computer acts like nothing is there. I installed the software on the disk that came with the starter kit, but when I open the powerline utility, it says "The local device hasn't been connected. Please connect the local device". From everything I've read about these things, they're supposed to be super easy to set up and get going. am I doing something wrong? I'm running windows 7 and the ethernet cable is coming into my brand new gigabyte motherboard. I've tried other wired connections before and they do work.