I'm just an amateur, so pls go easy on me. My computer is now installed with windows 2000. I would like to "format the drive" and reinstall windows, because my computer has been showing some quirky behaviours. I try to "boot from CD", and then I was asked in which partition I want the windows to be installed on. (My computer has two partitions.) If I don't want the old windows (and data) anymore, should I choose to "delete" the NTFS partition first? (It is the partition where my current windows is installed on.) If I delete it, would it affect the DOS, BIOS etc. that are preinstalled in the computer?