Things You'll Need
Instructions
Go to the PSP System Software Update website, which can be found in the Resources section at the bottom of this page, and download the latest update file version.
Connect the PSP to your computer via the USB cable and put the PSP into USB Mode by going to the ̶0;Options̶1; menu and selecting ̶0;USB Mode.̶1;
Open the PSP from your computer and create a folder named ̶0;PSP.̶1; Inside the PSP folder, create another folder named ̶0;GAME.̶1; Inside the GAME folder, create one last folder named ̶0;UPDATE.̶1;
Copy the update file that you downloaded into the UPDATE folder.
Fully charge your PSP battery and connect the AC power adapter. It must be plugged in for the update to initiate.
Select your memory stick under the ̶0;Game̶1; menu on your PSP to find the update and start it. Once selected, the update will automatically install and your PSP system will be restarted.