From what you are saying you have a corrupt version of the game that your downloading this could have happened mid download or from one of the sources you got it from, the only suggestion i can make it delete what you have already got that includeds the bit torrent tracker file and start again with over 100 seeds it shouldn't take all that long.
Just please remember once you have the download to completely remove your old game, reboot, install and DO NOT RUN the UPDATER.
Good luck