You are right about the minimum progs to load at Start Up and if the system tray is working then 'systray.exe' must have been executed. I've read that a rule of thumb method of determining the minimum is to activate all the progs in the 'Start Up' tab and sequentially switch them off until something doesn't work. It's worth a try. You don't say what OS you are using, but my Win98SE system starts with Scan Reg/Systray/StillImageMonitor/Antivir/Firewall/LoadPowerProfile and run=hpfsched. But I can see your problem if LoadPowerProfile is said not to exist, though I think that the trial and error method might decide whether you need it or not.