If you just want the official system, you can update directly through your console's settings: Go to Settings > System Update .

A vital tool used alongside CFW (like PRO or ARK) to make the custom firmware permanent (non-temporary) on models that previously didn't support it, such as the Street (E1000) 3. Installation Overview

You can download the update file (EBOOT.PBP) from repositories like DarthSternie or the PlayStation Support site. 2. Custom Firmware (CFW) — "The Good Features"

If you aren't on 6.61, download the official update, place it in PSP/GAME/UPDATE/ on your memory stick, and run it from the Game menu. Apply CFW: Download your chosen CFW (like ARK-4

) are you currently using so I can give you the exact steps? ARK-4 e/CFW for the PSP and PS Vita. - GitHub

The current and final official system software version for all PSP models is . 1. Official Firmware (OFW)

Installing CFW allows you to run games from a memory card, use emulators, and install plugins. The most modern and recommended setups are: