It was a mandatory update so it left the console useless until Sony came out with a fix.

Soon after its release, many PlayStation users complained about an error E-801809a8 that wouldn’t allow them to install the update.

When released, the PS4 5.0 firmware update was stuffed with a lot of new features and improvements. The update should apply automatically if your PS4 is in resting mode and if it is turned off, you shall get the prompt for this system update soon after booting up the console.