Look for your Alfa device in the output. Most Alfa 802.11n adapters will feature one of these chipsets: (Found in the classic AWUS036NH) MediaTek MT7601U Realtek RTL8188RU (Found in the AWUS036NHR)
Report: ALFA Network 802.11n Driver Installation and Support download alfa network 80211n driver patched
On Windows/Linux dual-boots, Secure Boot may prevent "unsigned" patched drivers from loading. If you'd like to narrow this down, tell me: Which ALFA model number do you have (e.g., AWUS036NH)? What Operating System are you using? Look for your Alfa device in the output
Setting up an adapter (such as the popular Go to product viewer dialog for this item. or AWUS036NEH download alfa network 80211n driver patched