If you are updating the system via the internet, go to [Settings] > [System Software Update] and retry the update.
If you are updating via a USB storage device, please try updating your system via the internet by navigating to [Settings] > [System Software Update] > [Update via Internet].
If this isn’t possible, please re-download the latest System Update at eu.playstation.com. You’ll need to install this using a USB storage device, and the correct folder structure. Details on how to do this can be found here.
If you are still experiencing issues updating the system software, please attempt to update via Safe Mode (Option 3).