Is your Outlook 2000 SP3 spiking to 100% CPU cycles after a few seconds of non-usage, too? I'm discovering more and more people are being sacked by this thing. So, here's something I inadvertently discovered during testing: when a reminder pops up, the CPU returns to normal. The good news is, you can set a reminder and keep it there for the duration of your session. That seems to keep the “100%” at bay. When the program is closed and reopened, you'll have to wait to be reminded once more before everything returns to “normal.” Weird, but it's a workaround that seems to work. At least for me.