Older version of LC vs Windows 10, app not responding

[Geoff Canyon]

I built an app for a friend of mine many years ago, I think with version
6.x of LC. He in turn has a customer running the app on Windows 10. Other
Windows 10 users aren't having an issue, but this one is getting a display
that says the app is "Not Responding".

I know that's vague, but I figured I'd throw it out there to see if anyone
has an idea.

thanks,

Geoff