I am having similar problems as you windsara - annoying :-P it still doesn't work for me and no solutions yet posted on this in the other two threads on this topic...
Re: why is my start menu not working in the windows 10 upgrade
I am also facing the same problem:
not able to open start menu, store app. The icons in the taskbar such as Notification, volume, wi-fi, clock are also not opening when I click on them.
I am also facing the same problem:
not able to open start menu, store app. The icons in the taskbar such as Notification, volume, wi-fi, clock are also not opening when I click on them.