I have several client machines (HP NC6120 Laptops) running Windows XP SP2 and Office 2003 SP1. The email profile connects with an Exchange 2000 server. Several users are seeing Outlook spike CPU usage to 100% when working with email. This spike can last from a few seconds to several minutes and some times requires that you perform an end task on Outlook. The users do not have administrative rights to the local machine and I have found that Outlook is much more stable when running Windows normally but Outlook in safe mode. Any ideas?