For those who have problems downloding the file:
Just create a .txt file somewhere on the desktop and copy this code:
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SOFTWARE\KONAMI\PES2013]
"code"="SHVY-3LE9-TMNH-7K5L-JN73"
"installdir"="G:\\KONAMI\\Pro Evolution Soccer 2013\\"
"version"="1.00.0000"
- then rename the .txt file to "pes13.reg", and open the file. It will appears a message that will ask for your request on adding a registry to your machine, just give the permission and the game will be fixed.
Good luck!