>Hello,
>
>We have a PC running WinNT 4.0 Workstation, and whenever you log in, the machine accesses the harddrive for about 5 minutes - without fail and without any indication of what it is doing.
>I've looked in the startup boxes, for my user and for the administrator and for all users, there is nothing.
>We have disabled the virus protection software (Norton antivirus and Norton utilities), in case that was the problem - but it didn't change anything.
>If I check the task manager, the only thing using the CPU is the IDLE PROCESS.
>I don't know where else to look - any ideas? Thanks!

I'd start by looking at programs started through registry entries; try HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion and look under the Run and RunServices keys, as well as the StartUp folders you've already examined. You could also see what's running through Task Manager.