Even a pristine compressed copy can have issues. Here is the fix guide:
Back in 2011, college hostels in India ran on a strange currency: not money, but megabytes . Internet data was scarce, and torrenting a full game—say, the 6GB version of Pro Evolution Soccer 2011 —was a luxury few could afford. pes 2011 highly compressed for pc
Officially, PES 2011 had full licenses for the UEFA Champions League, Europa League, and several national teams. For leagues like the Premier League, you had "Man Red" (Manchester United) and "North London" (Arsenal). For many, patching these fake names with Option Files became a beloved ritual. The Pursuit of Lightweight Glory: Understanding PES 2011