Hi
I've had exactly the same problem! Am so hacked off about it but have uninstalled avast and will NEVER use it again, especially as avast help have never bothered to reply to my email asking for help and it's been a week now.
Can anyone help me on here? I uninstalled avast and now my system is working well, no issues with web pages not loading or taking over 90 seconds each to load, if there is an image or video/ad on it. Fab.
But the menu is still a white box with just a list of writing, and I have no idea where any programmes are like Microsoft Office, or even the basic accessories like the calculator - I want all of these restored back to how it was when I first upgraded to Windows10.
I re-installed Windows10 yesterday but the menu is not restored - why is this and should I uninstall Windows10 before re-installing?
Any help would be amazing as I am gutted to say the least at how I have ended up in this situation, with a system that was fine (apart from coming up with 'low memory' warnings from Windows10) before I touched the evil avast cleanup.
Thanks for anything you can suggest (I have minimal IT knowledge so need basic instructions lol!).