HP Spectre 360 2 in 1, win 10 pro 64 bit with 8Gb memory. Trying to go to the start screen from desktop when I click the lower left win icon or tap the win key nothing happens. I believe it started happening after fall creators update. Strange part is: it is intermittent; I can start four or five times with no problem, then it happens again. If I start in safe mode all is normal and the next start (or 4 or 5) is normal, then it happens again. All I did was start in safe mode-I didn't change anything. Seems to be getting harder to correct lately. I mostly work from the Start Screen, all tiles are arranged in convenient groups for me so this is driving me crazy. Any help or suggestions greatly appreciated.