Model : Archer T4U

Hardware Version : v2.1

Firmware Version :

ISP :

I've made a combo TP-Link Wifi with:


- Archer C58 router
Version: 1.0.1 Build 20160803 rel.38503
Wireless Settings: WPA2-PSK (AES)
Mode: 802.11ac only
Channel: 40
Channel Width: Auto
WPS: disable
Strenght signal: medium


- Archer T4U adapter (US) v2.1
Driver Date: 11/11/16


- Win 7 Ultimate SP1 64bits
USB port: ASMedia 3.0


Problem:
When i turn on my computer, the adapter is enable and connect automatically to my Network.
In a few seconds, the adapter drops, stop blinking faster, and i can't scan any wifi signal, even for neighbour signal.
To restore my connection, i am trying to reconnect the adapter from USB port until the connection keeps stable.


My goal is to use 802.11ac signal (i can reach 780 Mbps easily), because my desktop is near from the router (6ft or 2 meters)

help me!!
thanks in advance!!!