I did a search for .jpg without an asterisk in front.
They are all still in my recycle bin, but not for long.
Reviewing them, they are old news pictures, and stock pictures, the kind you find in ads. I'm pretty sure they were "live tiles" pictures from when I first got the computer and before I upgraded from Win8 to Win10.
When it was a Win8 computer, I had an app that directly took me to the desktop and gave me a WinXP/Win7 style start menu. So I suspect the live tiles were working in the background collecting data and saving pictures.
It's not my main Internet computer. I think if the guys in Redmond were tracking me, they would think I'm a pretty boring person

Notes