For Online Computer Support, Ask a Computer Technician
Hiya, and welcome to Just Answer!
Game Sharing is only enabled specifically when you enable it, once you exit out of the game sharing menu options it is not running. You may want to try performing a hard reset of the PSP, you do that by powering on the PSP, then holding the power switch to off for about 10 seconds, which at that point it will fully turn off and reset the PSP. If you are still having problems, let me know what is showing up on your screen, and what happens when you try to perform different functions on the PSP.