Instructions
Connect the PSP to a computer through the USB cable that came with the game console.
Go to the ̶0;Game̶1; entry on the PSP and click on the ̶0;PSPLink̶1; icon.
Go to the ̶0;VSH̶1; icon on the computer's desktop and click on it to load the program.
Wait for the PSP to connect to the computer. This will be shown by ̶0;C:YpspsckYbin>pspvsh.̶1;
Type ̶0;nostv:// reset vsh̶1; into the prompt and press the ̶0;Enter̶1; button.
Wait for the command prompt to display ̶0;Resetting psplink.̶1;
Type ̶0;flash0:/vsh/module/vshmain.prx̶1; into the prompt and press the ̶0;Enter̶1; button. The PSP will re-enter the home screen.