How to wipe clean a hard drive, Windows 98 with no disk burner or working floppy drive?

Does anybody know of a free software to erase data from a hard drive before donating it? I have a Compaq Presario 1235 laptop purchased in 1999 and have tried Eraser and Kill Disk but they either won't work with Windows 98 or need a working disc or floppy drive to copy something to (disk drive doesn't have a burner and floppy drive is dead). I tried DBAN but couldn't figure out how to get it to work. I even did the thing where I got into the setup and set the computer to run from the disc drive first. Any insight would be greatly appreciated. Thanks.