Help with Compaq 2105US Laptop Wireless Connection

I was using my laptop for my cable connection to the internet. I'm not sure if I ever had a wireless drive, I may have deleted it in a panic awhile ago. I am now using my desktop for my wireless connection and would like to do the same with my laptop. Currently, my laptop is not connected to anything and does not have access to the internet. So, I would like to download, if I can, onto a portable drive and then upload to my laptop. If someone could help it would be much appreciated. I can't afford to spend the money to have someone come in and do it or take my puter out to have it done. Help!