Lost Connection

Hello,
I have a laptop(XP) that was connected to our desktop via a wireless router. I deleted "Broadcom" from my programs thinking it was for Broadband service which I do not use. Since then, I have been unable to get a network connection. Have looked at everything related to the internet connection but seem to be going in circles with troubleshooters, etc. Everything in the system says it's functioning and the original disc for the network setup doesn't seem to solve the problem. Don't really know where to go. Help!