i recived this laptop ( an old thinkpad 600) from my dad to work on. but when i try to format the hardrive with format c:, the command prompt says warning all data on disk will be lost... and i say yes. then it says cannot because the volume is used by another process... would you like to dismount and i say yes, then it says cannot lock the drive, volume is still in use. how do i fix this, i have the windows 2000 pro installed and the installation disk. please help me.