Hello,
Thank you for posting in Q&A forum.
To further troubleshoot this issue, you can try to delete DataStore.edb file.
But before taking this action, please stop the Windows Update service first to avoid any unnecessary impact.
Also, it's always wise to make a copy before deleting any data file.
After deleting the .edb file, you can restart Windows Update service again and check for update.
Hope this answer can help you well.