You can try another USB WiFi but if there are a lot of folk in the area with smart phones it may not help. This is where you get wired to avoid WiFi drops.
My dad owns a small business in a courthouse and has terrible signal. He uses Square Register to process payments. His internet service provider is Comcast. At a certain point during the day, his internet will go out while he is using the register and it will go into offline mode. Is there anyway to prevent this from happening or enhancing his wifi in anyway even though there is terrible signal in the building? We already have the best internet package from comcast and have tried other service providers.