If you are reinstalling PES 2013, do not skip this step. Install the Kitserver, unlock that 4GB of RAM, and enjoy the beautiful game the way it was meant to be played.
: Select pes2013.exe from the dropdown and click Attach . kitserver 13 104 indir
Select your pes2013.exe from the dropdown menu and click "Attach" or "Install." A "SUCCESS!" message indicates the game is now linked to Kitserver. If you are reinstalling PES 2013, do not skip this step