XP Hangman

Using XP Pro at home. Each time it boots up it reaches the point where normally programs would load in the background and begin to populate the bottom right taskbar. At this point the system hangs for just over a minute, each time. Everytime. Theonly programs running in the task bar are, Norton antivirus and Norton firewall. The only other icons are volume and the ATI console icon. Ive eliminated all un-needed programs from starting. Trimmed down my Services running in the background andin startup. I cant think of anything else. ANY ideas? Thanks.