The reason that it is not compatible with windows is due to the fact that there are many files & settings that are saved in the wrong way. The Pro Evolution Soccer 2021 patch is mostly made up of 'Shared Object Files', which are used by other programs to load up when your windows operating system attempts to load them. When you try and load up these games using your windows machine, many errors will appear, such as 'DLL unable to load'. This is why it is so difficult to play Pro Evolution Soccer using the pc.
However, if you are able to use a registry cleaner program on your pc, this will fix this problem. These programs are able to scan through your computer and repair any of the damaged or corrupted files that are inside it. This will allow you to run the Pro Evolution Soccer 2021 on your windows machine. Not many people know this, but this is the easiest way to get this game working on your computer.