huh?
1. remove harddisk from PC chasis.
2. take 8 Kg hammer and smack the sucker a good one.
3. take to high place and drop.
4. ensure that interior magnetic disks are truly scrapped.
5. bury it with the bugger who owns it... owned it.
alternately, first empty the recycle bin, then defrag the HD.
Delete the file in question.
Empty your recycle bin again.
Log on to the internet and start downloading some pr0n, about 15 megs should be enuf.
Defrag the hard disk again, then remove the pr0n, empty recycle bin.