The Windows XP startup disk allows computers without a bootable CD-ROM to perform a new installation of the operating system. The Windows XP startup disk will automatically load the correct drivers to gain access to the CD-ROM drive and start a new installation of Setup. Windows XP Home Edition startup disks will not work for Windows XP Professional installations and vice-versa. Windows XP SP1 and Windows XP SP1a startup disks are not interchangeable, for more information please see Knowledge Base article 310994.

Windows XP Professional with Service Pack 1a Utility: Setup Disks for Floppy Boot Install

Windows XP Home Edition with Service Pack 1a Utility: Setup Disks for Floppy Boot Install