Is there a microsoft xp program that I can download that will help me delete/clean old computer hard drive before I get rid of it?
Use your reinstallation disk and reformat Windows.
How to Reformat an XP Diskhttp://www.ehow.com/how_7422220_reformat-xp-disk.html
If you're paranoid about what could be found on the hard drive, take it out, melt it down and replace it with a new one.
Bruce Hagen
MS-MVP Oct. 1, 2004 ~ Sept. 30, 2010
Imperial Beach, CA