Microsoft Store failing to update or download

I'm having trouble with Microsoft Store. When I'm trying to update my apps, I get a failed error (0x80070015) and no update. I've come across the following article (https://answers.microsoft.com/en-us/windows/forum/windows_10-windows_store-winpc/windows-store-error-code-0x80070015/6e74a78a-1e18-4141-813b-031dac3a4d36) which seems to do no good. Short of re-installing Windows, does anyone have any experience or suggestions to remedy this problem?

This is on Windows 10 1803

Thanks in advance.

I don't have the same issue before.

I have seen the same error code in the link:How to Fix Windows Store Install Error 0x80070015

There are several methods, they could be helpful.

1. Clear Store Cache
   (1) press win + R
   (2) type wsreset.exe and press enter

2. Windows Store Apps Troubleshooter
   (1) open Control Panel
   (2) click small icon on the right-top
   (3) find and click troubleshooting
   (4) click view all on the left panel
   (5) then find and run the windows store app

3. Windows Update Troubleshooter
   It is the same steps as the windows store app troubleshooter, but right-click it and run it as administrator.

4. Clean boot
   This has been included in the link you posted.

5. Unload Power ISO Virtual Drive Manager
   (1) run the task manager
   (2) click details
   (3) find Power ISO related processes
   (4) end them

Hope above information can help you.