I installed win10 in laptop, at first is ok. But after few days, When I hit win key, no Start menu . When I press win +I ,no setting . and the icon of edge in taskbar disappear.  But log in another user account, everything is ok. I think It's because I migrated Location of User's Folders . So , I remove my use account ,and create another one, this time ,I didn't migrate user's path. but just a loop, at first is ok,  after few days, No start menu, no edge, no Win + I to setting. My problem must be something more. 

but ,use another user account ,everything is ok.

and If I open overmany pages and windows ,my laptop will be KERNEL_DATA_INPAGE_ERROR , Blue screen ,then restart itself.

Oh, my god. Should resist win10?&

Open PowerShell and run the following command:

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

==========

 1.Using DISM Commands

i) Press Windows + x on your keyboard.

ii) Select Command prompt (Admin) to open Administrator Command Prompt .

iii) In the Administrator: Command Prompt window, type the following commands. Press the Enter key after each command:
     dism.exe /online /cleanup-image /scanhealth
     dism.exe /online /cleanup-image /restorehealth

==========

2. Using sfc /scannow

a. Click on Start button and type cmd in search box.

b. Right-click on Command Prompt and select Run as administrator.

c. Type the following command and hit Enter.

sfc /scannow

this fellow is the result:

C:\Windows\system32>dism.exe /online /cleanup-image /scanhealth

Deployment Image Servicing and Management tool
Version: 10.0.10240.16384

Image Version: 10.0.10240.16384

[==========================100.0%==========================]

Error: 1392

The file or directory is corrupted and unreadable.

The DISM log file can be found at C:\Windows\Logs\DISM\dism.log

C:\Windows\system32>dism.exe /online /cleanup-image /restorehealth

Deployment Image Servicing and Management tool
Version: 10.0.10240.16384

Image Version: 10.0.10240.16384

[==========================100.0%==========================]

Error: 1392

The file or directory is corrupted and unreadable.

The DISM log file can be found at C:\Windows\Logs\DISM\dism.log

C:\Windows\system32>sfc /scannow

Beginning system scan.  This process will take some time.

Beginning verification phase of system scan.
Verification 69% complete.

Windows Resource Protection could not perform the requested operation.

HI, thks .

dism.exe /online /cleanup-image /restorehealth  is 100% ok, and sfc is 100% ok.

the fellowing is by powershell:

Add-AppxPackage : Deployment failed with HRESULT: 0x80073CF6, Package could not be registered.
error 0x8000FFFF: Adding a tile failed with unexpected error.
NOTE: For additional information, look for [ActivityId] ac4629e8-e16e-0000-0534-46ac6ee1d001 in
the Event Log or use the command line Get-AppxLog -ActivityID ac4629e8-e16e-0000-0534-46ac6ee1d001
At line:1 char:28
+ ...  | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.I ...
+                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : WriteError: (C:\Windows\Syst...ppXManifest.xml:String) [Add-AppxPack
   age], IOException
    + FullyQualifiedErrorId : DeploymentError,Microsoft.Windows.Appx.PackageManager.Commands.AddAp
   pxPackageCommand

Add-AppxPackage : Deployment failed with HRESULT: 0x80073CF6, Package could not be registered.
error 0x8000FFFF: Adding a tile failed with unexpected error.
NOTE: For additional information, look for [ActivityId] ac4629e8-e16e-0000-3234-46ac6ee1d001 in
the Event Log or use the command line Get-AppxLog -ActivityID ac4629e8-e16e-0000-3234-46ac6ee1d001
At line:1 char:28
+ ...  | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.I ...
+                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : WriteError: (C:\Windows\Syst...ppXManifest.xml:String) [Add-AppxPack
   age], IOException
    + FullyQualifiedErrorId : DeploymentError,Microsoft.Windows.Appx.PackageManager.Commands.AddAp
   pxPackageCommand

Add-AppxPackage : Deployment failed with HRESULT: 0x80073CF6, Package could not be registered.
error 0x8000FFFF: Adding a tile failed with unexpected error.
NOTE: For additional information, look for [ActivityId] ac4629e8-e16e-0000-7734-46ac6ee1d001 in the Event Log or
use the command line Get-AppxLog -ActivityID ac4629e8-e16e-0000-7734-46ac6ee1d001
At line:1 char:28
+ ...  | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.I ...
+                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : WriteError: (C:\Windows\Syst...ppXManifest.xml:String) [Add-AppxPackage], IOExcepti
   on
    + FullyQualifiedErrorId : DeploymentError,Microsoft.Windows.Appx.PackageManager.Commands.AddAppxPackageCommand
------=============================================================-

PS D:\Users\Discovery\Documents> Get-AppxLog -ActivityID ac4629e8-e16e-0000-be33-46ac6ee1d001

Time                      ID           Message
----                      --           -------
8/28/2015 5:10:29 PM      301          The calling process is powershell.exe
8/28/2015 5:10:29 PM      603          Started deployment Register operation on a package with main parameter:
                                       AppXManifest.xml and Options: 0. See
                                       http://go.microsoft.com/fwlink/?LinkId=235160 for help diagnosing app
                                       deployment issues.
8/28/2015 5:10:29 PM      10002        Creating Resiliency File C:\ProgramData\Microsoft\Windows\AppRepository\ab2
                                       c8f09-5d6c-467d-8d5e-e7545b1e5718_S-1-5-21-1402487030-1843968284-4187626435
                                       -1001_9.rslc for Register Operation on Package
                                       Microsoft.LockApp_10.0.10240.16384_neutral__cw5n1h2txyewy.
8/28/2015 5:10:29 PM      607          Deployment Register operation on package
                                       Microsoft.LockApp_10.0.10240.16384_neutral__cw5n1h2txyewy has been
                                       de-queued and is running for user SPIRIT\Spirit.
8/28/2015 5:10:29 PM      613          Adding uri to the list of Uris:
                                       C:\Windows\SystemApps\Microsoft.LockApp_cw5n1h2txyewy\AppXManifest.xml.
8/28/2015 5:10:30 PM      317          C:\Windows\SystemApps\Microsoft.LockApp_cw5n1h2txyewy\AppxManifest.xml(29,2
                                       4): warning: The 'windows.lockScreen' extension category in the
                                       Microsoft.LockApp_10.0.10240.16384_neutral__cw5n1h2txyewy package is
                                       unrecognized.
8/28/2015 5:10:30 PM      827          Capability parsing started for the package
                                       Microsoft.LockApp_10.0.10240.16384_neutral__cw5n1h2txyewy
8/28/2015 5:10:49 PM      5060         error 0x8000FFFF: Adding a tile failed with unexpected error.
8/28/2015 5:10:49 PM      303          error 0x8000FFFF: While preparing to process the request, the system
                                       failed to register the windows.visualElements extension due to the
                                       following error: Catastrophic failure
                                       .
8/28/2015 5:10:49 PM      300          error 0x8000FFFF: Cannot register the Microsoft.LockApp_cw5n1h2txyewy
                                       package due to the following error: Catastrophic failure
                                       .
8/28/2015 5:10:49 PM      605          The last successful state reached was ResolvedDeferredRegistrations.
                                       Failure occurred before reaching the next state RegistrationChanged.
8/28/2015 5:10:50 PM      401          Deployment Register operation with target volume C: on Package
                                       Microsoft.LockApp_10.0.10240.16384_neutral__cw5n1h2txyewy from:
                                       (AppXManifest.xml)  failed with error 0x80073CF6. See
                                       http://go.microsoft.com/fwlink/?LinkId=235160 for help diagnosing app
                                       deployment issues.
8/28/2015 5:10:50 PM      404          AppX Deployment operation failed for package
                                       Microsoft.LockApp_10.0.10240.16384_neutral__cw5n1h2txyewy with error
                                       0x80073CF6. The specific error text for this failure is: error 0x8000FFFF:
                                       Adding a tile failed with unexpected error.

achinaboy

Have you run Powershell as administrator before typing the commands S.Sengupta provided in the first post?

In addition, I recommend you install all updates on your computers since there are many hotfix released to improve Windows 10.

Consider if the issue is caused by virus, since it can work fine once you use new account, please try to scan system to check the issue.

Also, you can try the upgrade repair to get Windows 10 work fine:

How to: perform a repair upgrade using the Windows 10 ISO file
http://answers.microsoft.com/en-us/insider/wiki/insider_wintp-insider_install/how-to-perform-a-repair-upgrade-using-the-windows/35160fbe-9352-4e70-9887-f40096ec3085