Fred wrote:

The OS you use is no longer supported and doesnt
get security updates anymore so you have to update
the OS and the updated OS wont run that app.

I'm using Windows 7, which though it's officially no longer supported does
receive period security updates.

Or something else you decide you would
like to use won't run on your older OS.

The only program I've so far come across in that category runs very
successfully on my Win10 laptop, so - at the moment, at least - I have
things covered.

I take your points, though; thanks.