0x80070490 – Required item not found

A required entry was not found. The context can range from Windows Update to account setup.

Stop if unsure or if a new warning appears. Save your work before changes and ask IT before changing a work device. Never disclose passwords or recovery keys.

Note in which app or Windows function the error occurs.
For Windows Update: Restart and try troubleshooting. For an app: check its repair function under Settings → Apps.
If multiple Windows functions are affected, back up data and view the system repair guide. Do not remove accounts without secured credentials.

Test after each step and stop when the issue is solved. Checkmarks are not permanently saved.