Windows 10 - Start button is not working, windows photo image viewer is crashing, cannot close applications from the taskbar.

I really don't know what happened but I got several problems with a fresh installation of windows 10:

• Start button not working
• windows photo image viewer crashing
• cannot close applications from the taskbar
• SFC /scannow - not working
• ... and so on

Use explorer (or from the task manager or win button+R) to run cmd.exe (as administrator) from %windir%\system32 and then run "powershell.exe" otherwise run directly %windir%\winsxs\powershell.exe (as administrator).

Paste the following string in the powershell and wait





Get-AppXPackage -AllUsers | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)\AppXManifest.xml"}


I suppose that it should re-register the installed Apps from the xml manifests.








references:
http://www.thewindowsclub.com/start-menu-does-not-open-windows-10
https://technet.microsoft.com/en-us/library/hh856044.aspx?f=255&MSPPError=-2147217396