HDD wiper program

[kmufc77]

hi im going to be selling my F1 drives, they have been formated but im after a program that can severly wipe them so my data is unrecoverable

Is there a program that can do this on desktop or will it have to been in Dos?

 

[kmufc77]

ive been trying for hours to to make a bootdisk for either kill disk or dban i have used both cdr and flash drive and every time it wont boot.
i have selected the correct setup in bios to boot from CD before HDD and also tryed to manually boot using F12 and selected the drive with the cdr or flash drive

i have used several programs to copy the iso from Dban and still wont work i have gone through 10 cds cannot understand what im doing wrong
i have someone that will erase the data on my 2 F1s but he wants £15 so time im pay that and sell them ill be lucky to make £35