I have a Dell Inspirion 4550. We were living at temporary house and had the internet disconnected to move back in our original house. The internet never came back up on this machine. I have dsl with a gateway modem. Next is a lynksys router with wireless and 4 ports. The computer I am communicating on is thru that router and I have checked all 4 ports and wireless works. This tells me it is a software (driver issue) or hardware problem on the 4550. My neighbor who has a degree in computers has worked on this machine with no positive results. I have looked at many forums myself and tried many different things without result. My neighbor loaned me his cellphone internet connection. It worked. I have tried a couple of fixes that was recommended on this site under "no internet connection" no dice again. The 4550 is running windows xp professional. I reformatted the disk but cannot get on internet to download microsoft service packs. If anyone has got any ideas it would be greatly appreciated.