You've left out some relevant information.. Which operating system? Vista? Did the problem recently start with the addition on the new system or did the computer correctly connect originally? Do all the other computers on the network connect correctly?
As to Outlook, are you SURE you've got the settings correct? (Specially the CHECK mark usually required in the "This server requires a secure connection (SSL)" in the POP3 settings page. See THIS LINK[/url for the basic setup instructions which are similar in Outlook Express or Outlook.)
And what comes to mind here, IF the computer is Vista, have you updated the router and modem firmware with software that has Vista support?
Disabled the firewalls in the router and modem (if it has one) as well?
And just for kicks, if you haven't, please download, install, update using the manual updater below, then run the free Malwarebytes program using the direct download links from the links below:
Malwarebytes Installer Download Link (Clicking on the links below will immediately start the download dialogue window.)
Malwarebytes Manual Updater link
Hope this helps and let us know more.
Brand new HP system, quad core, 3.57 Gb RAM, 3 gig LAN card. Windows Firewall is off. I can get online via web browser but cannot send/recieve email in Outlook 2003 professional, update from within programs, or get any of my streaming stock/trader programs to connect. Nothing connects to the internet except for IE and Firefox. The computer can see the other PC's on the network and even exchange files. I'm going through an N router by Belkin and I have DSL through AT&T. Could really use some ideas here. Side note, DNS and IP are correct and/or have been renewed.