For the past several days I have been working with Microsoft Support Desk trying to get them to recover what was lost during a Windows 10 update; my App Store and most of all the apps that came with Windows 10. The techs did everything imaginable from downloading Windows 10 again to restoring to previous state. Finally today after I searched google for the problem, I see where CNET posted the problem in August 2015 and said Microsoft was sending out fixes or patches to resolve the problem. Today they gave me a more savvy tech who took remote access to my computer and finally said that it looks like AVAST has been deleting the patch when the update occurs and now the only solution I have is to do a Factory RESET, meaning back to original state but eliminating all my personal installed programs and apps. I've noticed in the past that I will get a warning from AVAST that a file is trying to download to my computer but says it is NEW to AVAST and AVAST recommends to not allow it. I find out it's an UPDATE to WINDOWS 10, so I click the Allow button. I've previously notified AVAST that i was getting this message but they seem to not agree. Looks like now, it's true, Avast deletes the update and now I've only got a choice to RESET unless someone has another idea. Really ticks me off!