How to disable internal wifi of a laptop
This video is useful if you wish to disable laptop's in built WiFi and use and external USB wifi. You will need to remove or disable Windows drivers for the original unit. You should also make sure that you turn off the switch for the built-in unit to save battery power and to avoid the possibility of interference.
To disable the drivers, do this:
Right Click Computer
The Properties
Device Manager
For rest follow the video