- Official Post
Check on your router what exactly is chosen for wifi connect.
the adapter supports 802.11a 5GHz
the adapter supports 802.11b 2.4GHz
the adapter supports 802.11g 2.4GHz
the adapter may support both 802.11n 2.4GHz, and 5GHz, but not necessarily
the adapter supports 802.11c 5GHz
Is your wifi split into 2.4 and 5Ghz or one for both? Wifi channel changed and tested?