I am sorry, but I do not understand why this should be a problem at all. This is one of the prime icons of Win 8/10 and an upgrade makes it inoperative? Same thing happened during the Win 7 to Win 8 upgrade. My Start button stopped working about a month after a recent upgrade this year. Now it only turns red and I shutdown by doing a Win+X and going for shutdown options. However, not only does the Win start button not work on the screen, the Win button on the keyboard alone pulls up nothing (i.e. the wonderful new great way of avoiding the desktop and getting all those movable rectangles....LOL) The really bad thing is, my desktop Dell was upgraded to 10 when I was downstairs watching TV without me even asking for it!! Shades of Win 8 upgrades!