Outlook 2003 CPU Usage

[redwing19]

I have a new Dell Inspiron 6400 notebook with a core2duo cpu. When first received from Dell, I setup Outlook using the "Save My Settings Wizard" from my old notebook. It never worked properly. No matter what I did, Outlook would go to 50% cpu usage (100% of one core) and become unresponsive within seconds. I decided to start from a totally clean environment and reinstalled the operating system (XP MSE 2005) and applications from scratch. Outlook and Office had worked perfectly for over a week. Unfortunately, this morning Outlook crashed. Since that point, it has been using 50% cpu (100% one core) and becomes totally unresponsive. I am very frustrated. I have tried disabling GoogleDesktop and Avast virus protection with no success. Safe mode exhibits the same problem. I don't think I have any add-ins installed except Outlook to OneNote and Adobe Acrobat PDF toolbar. If anyone has any suggestions on how to fix or even diagnose the cause of this, it would be greatly appreciated.