What is the four stage process for downloading and installing updates?

The four-stage process for downloading and installing updates typically includes: 1) Checking for Updates – the system scans for available updates; 2) Downloading – the required updates are downloaded to the device; 3) Installing – the downloaded updates are applied to the system; and 4) Restarting (if necessary) – the device may need to restart to complete the installation process and ensure all changes take effect.