Windows 10: How good is it running older programs?

And the answer is: "Very!" This is my favorite old photo-editing program from 2003, which I also need for accessing the Canon Scanner, and it's still very much 'alive and well' in Windows 10. So is Winroll, the little program that will roll up a window into its title bar, also from 2003. Look at the yellow title bar near the top of this next image - it's a collapsed version of Internet Explorer to demonstrate how this works....

And when I right-click on that yellow bar, it restores Internet Explorer's window again, and you can see the full window about Winroll. This is a real 'keeper'.

This next isn't an older program - Irfan keeps it right up to date - but it's also one of my favorites, because it does a lot of things with images and some of those might surprise you...

Suppose I would like to edit this image.... What choices are there? ....

Plenty! Here's the list. And under 'color corrections' for example, you can even adjust the gamma for more or less light. This is a wonderful program, and you can find it right here, and you should.