New
#1310
Rufus, I believe. But with @Ghot 's help, I was able to convert back to MBR (could have done with Rufus, but at that point I hadn't yet realized that was the problem), and it worked fine in Macrium. In the end, I used the ISO file created to disk in Macrium, and dropped that into a multiboot USB that way I can have various utilities, including Macrium, on one bootable USB flash drive.
On a Macrium related note, in the past when I was using Reflect v5 to make cold images of the Windows OS, I was only imaging the OS partition because I had the disk partitioned between OS and data partitions. In this new machine, I have a disk dedicated to the OS. I guess it's ok, and perhaps preferable, to image the entire disk, which includes the various small partitions that Windows creates?