I have read several previous posts relating to wrong drive letters, but can't see how this relates to my problem... Drive to be cloned has two partitions, 1st partition is a 3Gb FAT32 Recovery partition, the 2nd is a 72Gb NTFS (XP Home). The original drive boots up ok. My rig on the bench runs XP Pro and has TI-11 installed on it. I am attaching the drive to be cloned to the second IDE interface, and the new drive is attached to a third IDE interface on a plug-in PCI card. The cloned drive fails to boot when installed in the original PC, just sits doing nothing after the initial POST splash screen. I cannot see how that can be a drive letter problem. Checking the drive it appears to have all necessary files in place, and BOOT.INI shows partition (2). Incidentally, this setup has worked fine with other drives, both XP and Vista. I have checked the new drive by putting a different operating system on it, and it boots up fine, and there are no detectable errors on the drive. I have made sure it is jumpered the same as the original. Also tried wiping the drive, FDISK /MBR etc., prior to cloning. Where do I go from here?