I cleaned everything up, installed it on the system drive in the program files folder, removed any Cyrillic characters, and thoroughly checked the registry! This is a bug with Windows XP SP3, as the patches don't want to install, saying that the game is either not installed or installed incorrectly! I'll let you know the result after I install SP2 or SP3 Gamer Edition!
P.S. everything might also depend on the version, build, and type of Windows!


