Answer:
A wireless LAN driver is a Windows file or set of files that tells the computer how to communicate with the wireless hardware inside of it. It may also come with a utility that aids in connection to wireless networks. If you are looking for a particular wireless driver, you can google the maker and model of your wireless card and you should be able to download it. (That is supposing you have an alternate way of connecting to the internet, otherwise use a computer that is and put the driver on a jumpdrive/memory stick.)