This might be a really newbie questions but I have an old Windows 7 computer, that is connected to the internet with an ethernet cable--the computer network card does not have WiFi connection ability. So im looking for something that could add the WiFi ability to that computer--so basically be able to connect this computer to the internet/a router/hotspot wirelessly. Ive seen these things called USB WiFi adapter wich are very tiny USB connector that connect into USB ports, however im not quite sure if it does what im trying to do(I dont want to "share" my computer internet connection wirelessly,I just want to connect wirelessly my computer to the internet using WiFi connection. Plus, these devices can be found at really cheap prices like 5$ so I have some doubt on if it does what im looking for). Is this possible using a USB device and wich kind of device I should be looking for?