Windows store error code 0x80070015

Hello,

We appreciate your time and effort for getting back to us and I apologize for the delay in responding.

I suggest you to follow the below methods to see if it helps:

Method 1:

Clean Boot: To help troubleshoot error messages and other issues, you can start Windows by using a minimal set of drivers and startup programs. This kind of startup is known as a "Clean Boot." A clean boot helps eliminate software conflicts.  Here is the link for your reference to perform clean boot.

http://support.microsoft.com/kb/929135

Important: Please go through the section: How to reset the computer to start as usual after troubleshooting with Clean Boot of the Kb article to boot the computer in normal startup after fixing the issue.

If the issue still persist, proceed with Method 2.

Method 2:

I suggest you to create a new user account and check if the issue still persist under the new user account, please follow the below link to see how you can create a new user account

Create a user account
http://windows.microsoft.com/en-us/windows/create-user-account#create-user-account=windows-8

Note: Step applies to Windows 10 as well.

If the issue still persist, proceed with Method 3.

Method 3: I would suggest you to follow the below steps and check if it helps to resolve the Windows Store issue.

1. Press Windows Key+ R on your keyboard.

2.Enter the below command line on the run command:

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

3. Wait until finished and then try to open the store again.

Check if it helps to resolve your issue. For further assistance feel free to post your queries in Microsoft forums. We will be glad to assist you.

Thank You.