the Update FAQ clearly sais ( since the Enhanced Edition launch ) that you need to have both TWEE_Upgrade.exe and the language pack in the same folder with their original names, and then run TWEE_Upgradedo verify you patch files before installing: http://witcher.wikia.com/wiki/1.4_patchalso the new hotfix is here: http://www.thewitcher.com/forum/index.php?topic=21009.0gemani999 said:The language pack coresponding to the language version of the game already on your system was not found. Download teh relevant language pack.