This error appears to be related to expected files, folders or registry paths that are missing.
One commonly reported folder being missing is the C:\Users\Default folder.
Open the File Explorer, expand C, and expand the Users folder.
If there is no folder named Default, create one.
If C:\Users\Default exists please use the following guidance:
Run the Windows Update Troubleshooter, then open Windows Update and try to install the update again.
Then run the DISM tool
- Swipe in from the right edge of the screen, and then tap Search.
(If you're using a mouse, point to the lower-right corner of the screen, move the mouse pointer up, and then click Search.)
- Enter command prompt in the search box.
- In the list of results, swipe down on or right-click Command Prompt, and then tap or click Run as administrator.
- In the Administrator: Command Prompt window, enter the following commands. Press the Enter key after each command:
- DISM.exe /Online /Cleanup-image /Scanhealth
- DISM.exe /Online /Cleanup-image /Restorehealth
- To close the Administrator: Command prompt window, type Exit, and then press Enter.
- Run Windows Update again.
If you have C:\Users\Default and you have used the Windows Update troubleshooter and completed the DISM commands but still experience Error 0x80070003 please contact Microsoft Support so that we can further investigate your issue.