Ensure that the tool you're using is compatible with the version of PES 2016 you're playing and check for updates regularly.
While the minimum requirements for PES 2016 are relatively modest—requiring only 1GB of RAM and an entry-level GPU—stadium environments with high-density crowds can still cause significant stuttering on older hardware. pes 2016 crowd disabler tool
Before applying any patches or modifications, always back up your game files to prevent data loss. Ensure that the tool you're using is compatible