MS upgraded my desktop from win8.1 to 10 just a couple of days ago. It worked fine for a day or two, and then the app icons missing from the taskbar and the remaining start, search and taskview buttons not responding at all. Later the internet connection and sound icons appears with a x on them. Other icons in the notification area are also missing except the notification icon. Have tried sfc /scannow and "find no integrity violation". Please help.