You can use any of the methods mentioned above to download and install wireless drivers on your Lenovo Thinkpad. However, you would need an Internet connection to download the driver. You can use Ethernet if you have a cable. But if you don't have an Ethernet cable, then there is no need to get a new one. You can download the driver in question on another device and then install it on your system. Once, you are connected to the Internet, just update it and you will be good to go.