Oooooooh, you might end up with a slap on the wrist for even mentioning the word "crack", a re-download and re-install should fix whatever is missing from your SH4 game, but, if its a virus that is causing the problem then you'll need some kind of virus killer to fix that.
Some more information is needed about the version of SH4 you are running would be helpful, if you look on the bottom right of your main menu screen it will tell you which one you have, that's a start anyway, I'm sure someone else will come up with something else so be patient.
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