Can't see 5ghz on router

Edit: Solved. I had to install the official drivers instead of using the ones supplied with Windows 10. That's how it goes, toil for a few hours, make a big thread about your problem, then you instantly figure it out after you click submit. Oh well, keeping it here for Google sake.

I just bought this adapter and I'm beginning to wonder if it's faulty or just missing a setting on my N66U. This is my first 5ghz adapter so I...

Can't see 5ghz on router