Can't find any way to prevent mouse hovering from opening a file

Brink said:

It sounds like you are in Settings instead of the Control Panel as specified in the tutorial.

https://www.tenforums.com/tutorials/2...dows-10-a.html

Yes, you are correct. I had just discovered that. Really, really weird and unintuitive that they would be completely different, but that is another subject. And Control Panel seems much harder to find in Win 10 than in earlier versions. I had to resort to the Windows key + R and a command to ferret it out. But having finally gotten there, the relevant box was not checked. I checked it, clicked apply, then unchecked it and clicked apply again in hopes that will drive a steak through the ugly buggers heart, but only time will tell.

Brink said:

How about the double click to open items option instead?

Single-Click or Double-Click to Open an Item - Windows 7 Help Forums

Had already picked that option.

The procedure outlined above, checking the (previously unchecked) hover box, clicking apply, unchecking the hover box, and clicking apply looks like it might be working. Keeping fingers crossed.

Yes, I think so! :)