Originally Posted by P33Man
You ONLY need to delete the Game data and probably the downloaded character. The updates should have nothing to do with it.
I did NOT have the character as a download (I got it for the having BF3 account activated), so that is not a issue.
It is the SAVED GAME profile data that is fucked.
I did NOT delete the HD content.
I DID delete the day 1 patch file, the saved file and online pass. They can all be re-downloaded in 2 minutes so it is not that bad and it is just a minor safety to take to ensure all the bad data is gone...