I have so much problem install Atheros ar9380 driver for windows 7, the official driver from http://www.atheros.cz doesn’t really work for me. Since TP LINK TL-WDN4800 has ar9380 chipset, the TP link driver works on windows 7.
TP Link TL-WDN4800
http://www.tp-link.com/en/support/download/?model=TL-WDN4800&version=V1