How do you permanently delete something from your hard drive?

overwrite the same sectors it occupied (not the same as overwriting the file)

>>58727032
By installing gentoo

>>58727053
Is there some program I can use?

>>58727032
Dban and start again

>>58727097
yes.

# dd if=/dev/zero of=/dev/sdX bs=4M && sync

dd with zero

>>58727185
>>58727187
Do I do this in Command Prompt?

As you can probably tell I have no idea what any of this means

By putting the hard drive in the microwave.
Just set it to 90 minutes and you'll know when it's finished.

>>58727304
Should I coat the pan beforehand so it doesn't stick?