A video walk through is at the bottom of the page.
The Alfa AWUS036H USB adapter/dongle is a good USB adapter that has been around for many years.
Recently when I tried to use The USB adapter with Windows 10 it wouldn’t work.
After playing around a bit I installed the drivers manually.
Steps To Install The Alfa AWUSU36H USB Adapter with Windows 10
1…If you don’t have the AWUS036H Windows 7 64 bit driver you can download it from Alfa here. http://www.alfa.com.tw
2…Extract the folder if you had to downloaded it.
3…The files we need are located in the Win7X64 folder which is under RTL8287 folder. Don’t click on the install files simply know were there are at.
4…Be sure the adapter is plugged in and go to Device Manager by typing it in the bottom box. Click on it when it comes up.
5…Click the arrow on Network Adapters and you should see the Alfa adapter there. It most likely has a yellow icon indicating a problem. click on the Alfa adapter.
(I already fixed the problem so it is showing fine in the picture)
6…A box will come up click the Update Driver tab.
7…Click the bottom but that says Browse my computer for driver software.
Select Let me pick from a list of device drivers on my computer.
9…Click Have Disk
10…Click the browse button and point it to the Win7x64 folder that contains the drivers. It is located under RTL8187–>Win7X64
11…After selecting the file click OK than Next and the driver will install.
Your Alfa AWUS036H USB adapter should now work with Windows 10.