Well, if nothing else there may be a skill issue with how you handled extracting the game. There are also issue with not knowing details, like what operating system you're using since that can make a HUGE difference in bug fixing.
Assuming you're on windows, here's some things to check.
First, did you actually extract the game? Not extracting the game causes issues. If so, did you extract the game to the default windows or programs folders? Extracting games there can cause issues. Have you updated your drivers, OS, exc? What program did you use to extract the files? Depending on the program it can mess up non-latin alphabet characters. In particular for older versions of windows you need to switch to both japanese / chinese localization and non-unicode settings. The most recent versions of windows don't have issues with this, but some extraction programs still cause issues.