Start by booting the system into Windows XP Pro.
Use My Computer to navigate to the C: drive and delete the folder that contains Windows XP home.
You will need to confirm that it's okay to delete read-only files, and executable files.
Select Run from the Start menu and type
Click on the BOOT.INI tab and click on the Check All Boot Paths button.
Your system will report that the path used to launch Windows XP Home is not valid and offer to remove it.
Click on Yes.
From now on, your system will boot directly to Windows XP.