I just purchased an old Dell OptiPlex GX620 with a Pentium 4 processor. The computer came with a wiped hard drive, so I am trying to install Windows XP Pro Service Pack 3 from a Dell installation 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. Any help you can provide would be appreciated. Thank you!