I have my PC connected to my BT Disc network, which is carrying the signal from my router downstairs. I have full coverage on my PC and it says it's on a 5Ghz network. But, I don't have a 5ghz option to choose in the advanced properties on my TP AC600 Adapter, it just doesn't show up.

1: I've updated to the latest drivers.

2: I've changed my wireless mode to IEEE 802.11ac.

3: I've changed my router channel to various channels.

I still can't make the 5ghz option appear within my adapter settings.

Any help is much appreciated. Thanks.