How do I reset windows XP without a CD? Also, when recycling a Dell desk top how do i ensure everything is off the hard drive and memory

How do I reset windows XP without a CD?

You can't you need the installation media.

Also, when recycling a Dell desk top how do i ensure everything is off the hard drive and memory

I use BCwipe for single files additional drives, it's a free utility http://download.cnet.com/BCWipe/3000-2144_4-10009333.html

Or if you want to wipe the entire hard drive you can use any low level format utility like this one.... http://www.softpedia.com/progDownload/HDD-Low-Level-Format-Tool-Download-37794.html

AJZ

Your welcome and thank you for taking the time to say thanks.... :)