I have a Dell running 2005 XP Media Center Edition in a RAID 1 (mirroring) array. The array seems to be breaking down after 4 years and verifies every couple of boots. I want to trash the RAID array, put a new single drive in the machine, and reinstall the same OS, to see if I can coax another year or two out of the box. My question relates to updating the old OS. Is the OS still supported? I still seem to be able to update the OS. I looked for Service Pack 1 online, and could not find it. Service Pack 3 is the only one I can find for download. Is SP3 an accumulation including SP1 and SP2, or is there a pre-requisite that 1 and 2 be present to add 3? Any other suggestions would be welcome.