You can reformat the drive by booting to a startup floppy and entering the
command
FORMAT C:
Repeat for D, E etc or however many partitions you have.
A slightly more thorough deletion will use ZAP or WIPE from this site:
http://www.microstorage.com/Harddriveinfo.htm
If you are concerned that anyone might actually attempt to retrieve deleted
data, then you need a utility like this:
http://www.thefreecountry.com/security/securedelete.shtml

Signature
Jeff Richards
MS MVP (Windows - Shell/User)
> I'm giving away my 6-yer-old Dell computer with Windows
> 98. I think I've deleted all the personal information
> from the hard drive, but I want to be sure. How do I
> erase all the data or reformat the hard drive?