Hi! Windows Update error 0x80242016 usually indicates that the update installation did not complete successfully, often because the update process was interrupted or the system requires a restart before continuing. This can happen if another update is pending, the update service encountered a temporary issue, or if your system files need to be refreshed before the update can proceed.
To resolve this, first restart your device and try running Windows Update again. If the error persists, you can run the Windows Update Troubleshooter from Settings > Update & Security > Troubleshoot > Additional troubleshooters. After completing these steps, check for updates again to see if the error is resolved.