Part of the problem may have something to do with Internet connectivity (i'm not sure how reliable this part is, but it seems to fix the problem for some people), with Permissions (Run as Administrator and/or install the game somewhere NOT in Program Files (it gives trouble for some games for some Computers)) and with not copy-ing the crack (There is a crack in the .ISO file that you may need to copy, weirdly enough it seems only some people need it)
