If anyone else can contribute an explanation, please post!
Yes, I'd be pleased to see another angle.
When I first installed the game on the problem computer I'm damn sure that on the first automatic startup of the game that it started in the full 100% screen.
Can confirm that the software downloaded from the windows store for my son is running at 100% on 1366 x 768.
Surely if there was an understood & simple problem concerning resolution prospective buyers would be more clearly warned in order to make a more informed choice & avoid any dissapointment?!
On the other hand, as many of the lower priced laptops (like mine & my sons) typically have a resolution of 1366 x 768 wouldn't there be many more queries about this problem flooding the forum?