Hi,

I experienced a problem this week-end to repair a Windows 10 computer (installed following an in place upgrade from 8.1); The PC is an ACER Aspire E15

Symptom:

Initially this PC has been upgraded without problem, but after a moment (several months in my case), the behavior

the new modern UI start menu cannot start

the search and cortana cannot start

the new Microsoft edge cannot start

Resolution:

After investigations and preliminary tests, here is my solution;

Open the Task manager.  Here’s a tip:  Press CTRL+Shift+ESC.
Click File > Run New Task
Make sure you have a check mark beside “Create this task with administrative privileges”

Type the following 4 commands at the CMD prompt one by one:
dism /online /cleanup-image /restorehealth
sfc /scannow
powershell
Get-AppXPackage -AllUsers |Where-Object {$_.InstallLocation -like “*SystemApps*”} | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register “$($_.InstallLocation)\AppXManifest.xml”}
Close the window command prompt.

If the problem has not been solved at this step; do the next steps beloz:

Logon with another administrator’s user profile

Backup the data of the faulty user’s profile

Remove the user’s profile (and remove old folder under c:\users\<faulty user profile directory>)

Recreate a new user account and test. the Problem should be resolved at this step now.