If we had a clue as to what system you have or more specifically which network card you are using we might be able to help more.
Run the system information utility
Hold the Windows Logo Key and strike the R key and type
msinfo32
and hit enter
save a copy to your desktop (file save), give it a name
zip it up (right click, send to, compressed folder)
and attached the zip file to your next post and we'll take a look for our self.