Ok so you have a nice motherboard and 1-2 hard disks and you want after a lot of OS installations and uninstallations, to make the hardware look like the day you bought it, CLEAN of anything! I was thinking of doing a low level format (full format) on the hard disks with sth like KillDisk and reset the BIOS by pulling out the battery for 10 or more minutes. The goal is to bring my hardware to the state as it was when I bought it from the store. Any more or different ideas? Thanx!