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 
January of 2021 and this is still working on Win10 pro v2004.
Thanks for this. Have been fighting with the install for a few days now and this looks to have done the trick. Fantastic!!
You save me men. Thanks. Working in W10Pro.2004
Worked instantly. Took literally 30 seconds after hours of trying other stuff.
Yo this saved the day thanks works just fine now!