Client of mine has a Dell 2400, XP-Home, Hitachi Deskstar 180GxP 80GB harddisk, model IC35L090AVV207-0. On the dot, every 10 minutes the HD sort of makes a grinding noise, like it is doing a backup, or start a search or anything. I have deleted all tasks, uninstalled NAV 2003, stopped Outlook Express from automatic checking, switched off any automatic updates in every single program on this PC, as well as update for XP itself. Could the HD be overheating? (temp. 39 C)? DriveFitness Test is OK, only 7GB from 80 used. Fully checked, defragged, etc. Any suggestions what this might be? It's driving my client crazy!