I've been having this problem the last 2 days. Every 5 minutes, down to the second, my system freezes for about 30 seconds. I've used process explorer to determine that it's services.exe that is the problem. My hard drive was formatted less than a week ago, and win2k pro was freshly installed and updated with the rollup service pack 4. I'm running norton av/firewall. Everything ran great the first few days until I installed office 2003. I've tried reinstalling sp4 as I found that there was some kind of problem occassionally with it. I've also reinstalled liveupdate as I've read that there was some problems with that sometimes too. On a whim, I completely uninstalled both norton and office and removed every reference in the registry that I could find and all folders left behind by them and rebooted. But the problem persisted. The only thing that seems to stop the utilization spikes is to go to network places and disable my lan connection. But as soon as I reconnect I get the spikes again. Anyone have any ideas on this?