: Before making changes, it is highly recommended to back up your current registry settings.
: Resolving the message "Pro Evolution Soccer 2013 is not installed" when the game is actually present on your drive. Pes 2013 Registry File 64 Bit
The solution often lies in a designed for 64-bit architectures, which manually adds the necessary game information to your Windows Registry. Why You Need a 64-Bit Registry File : Before making changes, it is highly recommended