I have an old Dell OptiPlex GX620 with a Pentium 4 processor that I am wanting to play older computer games on. The computer came with a wiped hard drive, so I am trying to install Windows XP Pro Service Pack 3 from a Dell reinstallation CD. I am able to install the operating system fine, but I can never get the system to connect to the internet properly. Internet Explorer will only connect to the MSN website. I have installed all of the drivers from the Dell website (BIOS, Chipset, Video, Audio, Network, etc.). I made sure I installed them in the correct order. I tried installing Internet Explorer 6, 7, and 8 with the same results. I have tried connecting to the internet using a wire and wireless internet. I have turned off the firewall, cleared the browser cache, internet history, and reset the default internet settings. Nothing has worked. I also get the same results when trying to install XP on an OptiPlex GX280 as well. I know that the connection to the internet is working, because firefox will go to webpages correctly, but I need internet explorer to work though because the windows update system relies on internet explorer and wont work with firefox. I have another XP computer that goes to these webpages fine and connects to the windows update system without any problem, so I have ruled out webpages not supporting the older browser. What else could be causing this issue?