To start from scratch, you will need a valid copy of an XP install CD. There's not much way around that, and to be honest with you, our forum rules do not allow us to help people who are not using a valid version of Windows.
You would make sure that your BIOS is set to try to boot from CD before it attempts to boot from the hard drive, insert the XP install CD, and choose to do a full/fresh installation. That will reformat your drive, erasing everything you currently have on it.
Reputation Points: 221
Solved Threads: 369
Wombat At Large
Offline 6,439 posts
since Dec 2003