I reformatted and redid a clean install to Windows 7. Unfortunately, Windows' only System Image function refuses to function on that install, because it complains there is not enough storage space. It seem the System Reserve partition that Windows created during the install process is the problem. It is 500 MB, but with 325 MB used. Apparently that means there is not enough space on the partition to create a compressed directory in preparation for the imaging process. How stupid is that?
Of course Acronis works fine, and BTW, the new interface for True Image 2015 is very slick and easy to use. Way, way better than the last one I tried, which was 2011 and apparently it's better than anything before 2015. Furthermore, the later 2015 versions are fully compatible with Windows 10.
However, I note that Macrium is free for basic usage, and the latest version is also fully compatible with Windows 10, so maybe I'll try that.