NETGEAR Nighthawk WiFi adapter throttling internet..

I'm at a loss. It started with a speed test to see what exactly I was dealing with. Getting kbps instead of mbps. We pay for a gig of internet, for frame of reference. I have just bought the adapter and it's plugged into my desktop computer. Registers my internet and everything. It just doesn't get about kbps. I've repaired and updated but I can't even surf the internet at those speeds. I checked multiple devices and everything is fine, except my desktop. Thoughts?