I wouldn't say it's like clockwork, but it happens between 10-30 minutes after I log on. I have dial-up access to the 'net and use ICS to let my kids system (WinMe) get to the internet. I also usually have multiple IE windows open. I have power management(and ACPI) disabled. I have run the CPU at default speed for many days with the same result. Without ZA (I have Black Ice installed now), and at 900Mhz, I haven't rebooted for more than 2 weeks untill earlier today after I installed an application. I don't have any scheduled tasks, but I leave my system on all the time. I also have Norton Antivirus 2001 installed with all the latest updates. Which logs do you want to see?