Looks like I don't have /boot/overlays folder. Folder /boot contains only boot.sdi file.

Why can't it be too old? According to what I found in the internet these changes to config.txt are much older (at least lcd_rotate setting) than this Win10 IOT build which was released in October. But older builds don't work too. And that's down to Microsoft to fix That's what I'm afraid of, but I ...

It's latest 17763 build, it can't possibly be "too old". It can only be broken.

Is it possible to rotate the display by 90 degrees together with touch screen? I tried multiple things and nothing works. I tried to set Display Orientation to Portrait in Windows Device Portal but it has absolutely 0 effect on anything. Setting lcd_rotate=1 or lcd_rotate=3 manually in config.txt ha...