For the third time I installed Windows 10 on my main system. This time it appears to work, or at least I haven't encountered any of the previous difficulties that required me to revert to Windows 7.
The process was not without incident. The "This is taking longer than expected... just a few more moments" message displayed not for moments, but for over an hour. Then it wouldn't shut down. Then when it rebooted, it came up to a black screen.
If you're going to do a Windows 10 upgrade, it's essential you have another machine nearby so you can search Google and YouTube for solutions to these problems. As usual, the worst place to look is on the official Windows support site.
Once you're up and running (and, it seems, running slower than Windows 7), you'll discover Microsoft is like Giant Eagle... rearranging the layout of things for no obvious reason. For example, the Backup and Restore functions on Windows 7 were located on the control panel and named "Backup and Restore." On Windows 10, those functions are located under something called "File History." Why? In my 30+ years in computing, I've never asked or been asked for a current "file history." The term has been, and will continue to be, "backup."
I'm certain more delights await, but I'm committed now, at least on this machine.
To paraphrase myself, calling Windows 10 Microsoft's most advanced operating system is like saying Moe was the smart Stooge.