I purchased Alfa Mini 11N 3001n 300mbps wireless N Pico USB adapter wifi and plugged it into my USB port. Nothing happened. I plugged in all other USB ports on my laptop but it did not recognize it at all.
I plugged the same into another system of mine and it picked it up perfectly alright. I realized that my laptop’s USB might have become loose to not recognize the wifi adapter. Hence I lightly pressed the adapter’s ends together (with a plier) to make them tighter when plugging into my USB port. And voila! There it was recognized and picked up by my laptop which is running Windows 10.
Hope it works for you too.
Realtek RTL8188FTV Wireless LAN 802.11n USB 2.0 Network Adapter
Alfa Mini 11N 3001n 300mbps wireless N Pico USB adapter wifi