Alfa has not released a driver package for Alfa AWUS036NHA (Atheros AR9271 chipset) beyond Windows 7.
However it has come to our attention that AWUS036NHA can be stable on Windows 8, 10, and 11 using this third party driver. This driver was made for a different brand product which uses the same AR9271 chipset. Note that after installing, the device will appear in Device Manager as "TP-LINK Wireless USB Adapter" instead of Atheros or Alfa. This is because TP-Link is associated with Microsoft as the Device Developer ID of this driver package.
We have tested the driver extensively and it appears to work with the Alfa AWUS036NHA well. However it should be considered a beta driver until further notice.
Military and First Responder 
Works Perfect in Windows 11,
Version: 21H1
OS Build: 22000.795.
Works great for the Alfa AWUS036NHA on Windows 11 as of May 2022. Thank you!
This actually works I’m glad I found this page. Thanks a lot for posting and sharing the driver.
Worked fine for current Win10
March 2022
windows 11 perfect !!