I am running XP Pro on a 933Mhz PIII with 512MB Ram. My system seems to run fine most of the time (Processor use very low, PF Usage anywhere between 100 MB and 400MB if I am running a lot of stuff). However, when I run Outlook 2003, my PF Usage jumps to 1.6 GB and my computer slows to a crawl (Processor use remains pretty low after a short spike). This problem started a month or two ago. The program used to run fine. It started when I was using Outlook 2000. I didn't buy 2003 to fix the problem, but I was hoping that it would be a positive side effect. No such luck. I have archived my .pst file to a reasonable size, compacted it, defraged it and everything else on the computer, and it has had no effect. As a last resort, I figure completely uninstalling Outlook and installing it again might fix it, but I want to try to avoid that because it will mean reinstalling and resetting a couple other 3rd party applications that work with Outlook (Palm stuff, which I know is not the cause of this problem because the problem started well after that stuff was installed). Has anyone else experienced this with Outlook? Am I going to have to reinstall, or can someone save me?