I downloaded the QR code app linked to by Andy, and it works OK. But when I set it up, it offered to put a link onto the task-bar (Win 10, BTW), which I accepted as there was no other location offered. But I'm unlikely to use it very often, and would like to put the link on my desktop rather than the task-bar. But I can't see how to move it - it won't drag-and-drop - all it offers is for me to remove it from the task-bar, but then I won't be able to activate it if I ever need it again, and it doesn't run automatically when I open the MS camera function.
So how do I put a link to that QR code app onto my desktop?