Windows 10 store error might be possible if your date and time is not accurate. Ensure that your date and time is correct.
Click on start and type Powershell.
Open Windows powershell as admin and type the following command and hit enter.
powershell -ExecutionPolicy Unrestricted Add-AppxPackage -DisableDevelopmentMode -Register $Env:SystemRoot\\WinStore\\AppxManifest.xml
Hope that helped.