Microsoft support and most "help" sites I visit tell me the primary partition containing the OS should be made "active" to allow BIOS to identify the boot partition. \r\n\r\nThis confuses me somewhat as my disk "c" has only one partition and "Disk Management" shows it as being a "Basic" NTFS partition. It confirms it as being "Primary" but not "Active".\r\n\r\nDoes this mean that it is not after all, necessary to make a boot partition "Active" in XP?\r\n\r\n\r\n\r\nAlso, if I may I would like to ask another question and that is:- \r\n\r\nI have bought a used but formatted OEM disk of the same volume and single partition as my disk "c" and I intend to use it to "Clone" the whole of disk "c" and keep it as a bootable disk as a backup. However, I get the impression from various sources there is a problem with using an OEM disk for this purpose. Is this correct?