YOU LITTLE ILEGAL! lol but just try what i said if no work just reinstall game cuz torrent is same file as in download and we must not talk about torrenting hhere
Torrents are not illegal. Torrent is a form of sharing data over the internet. Sharing illegal data which violates laws is not allowed, but not torrents themselves.
But anyways just delete Dust2 from your CSS folder, launch CS again and it should download a good version next time you go on.