|a linux live cd is a cd containing a fully bootable operating system - in this case Linux and not windows. (you can get windows ones but their are a pain to create).|
its like dual booting, if youve heard of that. or using a different operating system on your computer.
short version - you download your linux live cd such as puppy linux, burn it to cd, then boot from that cd. (can also be done from a usb pen drive).
the bonus is that a live cd can not possibly but using the files you want to delete as it is an entirely different operating system. im guessing that windows is somehow stopping deletion.
if your interested i can link you to some websites / give you more information. i dont want to over load you with information if your not interested.
oh forgot to mention it is free and legal.