This is a Dell PC and didn't come with Windows installation disks, so I've been using the recommended WinPE 3.1 for my Macrium rescue media. After cloning/copying to the new disk, I switched the SATA cables back and forth on the motherboard a couple of times, as I re-lettered the partitions and gave the ones on the old disk new volume names so I wouldn't get them confused, added a new logical drive on the new disk using AOEMI Partition Assistant, and converted the new C: partition from FAT32 to NTFS (with a contiguous MFT) so that I could create a Macrium Rescue disk.

I suspect the problem has something to do with the copy of Macrium Reflect that was installed on the old HDD, which is still present (I keep finding files on the old disk that somehow didn't make it onto the new one, so I'm keeping the old disk around until I'm sure I have everything I need off of it). The next time I try again to add the recovery option, I have one more nonfunctional Macrium Recovery option added to the list - I'm up to 4 nonfunctioning ones and one functioning one, now, in addition to the nonfunctioning entry for Windows XP. I do have one functioning Macrium Recovery option on the menu, so every time this happens I can go into it, run bootfix, and reboot - whereupon I can again boot into Windows XP on the new disk, but no longer have a boot menu at all. Multiple steps later (see below), every time I try to add the Macrium Recovery option to the boot menu, I lose the ability to boot into Windows XP ( tldr missing or corrupt) and I get another nonfunctioning Macrium Recovery option added (required device is inaccessible). I had a failing HDD on an old WinXP SP3 machine, and used Macrium Reflect 7 Free (plus SpinRite 6 and Beyond Compare) to salvage the OS and data and clone/copy them onto a new HDD.

Reflect7