Can't install or update store apps

They all display error 0x800706d9 . I've read it could be related to Windows Firewall. What I have done:

. Microsofr Fixit (for Store and apps )
. Restarted Firewall, bits, wupdate and cryptographic services
. Lookup events log

Depósito con errores , tipo 0 (Repository with failures / errors , type 0 )
Nombre de evento: StoreAgentDownloadFailure1 (Event name ... )
Respuesta: No disponible ( answer : unavailable )
Identificador de archivo CAB: 0 ( file ID )


Firma del problema: (Issue signature)
P1: Acquisition;Microsoft.WindowsStore_8wekyb3d8bbwe
P2: 800706d9
P3: 14393
P4: 187
P5: Windows.Desktop
P6: K
P7:
P8:
P9:
P10:

Funny thing is, I can normally install Windows Updates just not apps updates (or install new ones either )

Microsoft store and Microsoft update are two different items. The microsoft ifixit tools are worthless. See the following for fixing the store.

Windows key and X key to bring up the right Context menu..

Right click on the powershell and click on Run as Administrator.

And run the following in a Command Window to re-register:

powershell -ExecutionPolicy Unrestricted Add-AppxPackage -DisableDevelopmentMode -Register $Env:SystemRoot\WinStore\AppxManifest.xml

I got this:

+

Add-AppxPackage -DisableDevelopmentMode -Register $Env:SystemRoot\Win ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : ObjectNotFound: (C:\Windows\WinStore\AppxManifest.xml:String) [Add-AppxPackage], ItemNot
FoundException
+ FullyQualifiedErrorId : PathNotFound,Microsoft.Windows.Appx.PackageManager.Commands.AddAppxPackageCommand

THank you! I know it's the last to try solution but "Refreshing" Windows fixed everything