Dell notebook got a virus and I formatted it and installed all the drivers yet the wireless wont be detected?

My dell Inspiron 1505 notebook got a virus and stopped functioning so my brother formatted it for me. We reinstalled the windows XP and all the drivers and applications it came with. For some reason it will not detect our (or any) wireless network. I'm not sure what to do in this situation, and our warranty has expired.Dell notebook got a virus and I formatted it and installed all the drivers yet the wireless wont be detected?HEy i dont know but somebody does i think i dont know.