"Local Area Connection" Doesn't Have a Valid IP Configuration

[Skorpheus]

I've seen tons of posts with this same title, but nothing has helped me. I'm trying to use the ethernet ports on my router, but it's not working. I'm able to connect just fine wirelessly, but for whatever reason, this pops up as an "Unidentified network" with "No network access" in the Network and Sharing Center.

 

[Skorpheus]

Never mind, it seems the problem is with my computer's LAC adapter.