@luklas1997 I understand how frustrating this can be as it's happened to me. These two solutions have worked for me in the past when BF3 wouldn't launch via Steam:
Go to C:\ProgramData\Electronic Arts\EA Services\License and delete the file/s there then start the game. The game will create new ones and then it will work. This happens to me every time I have a windows update.
If that doesn't work try this:
Close Origin and all Origin processes in the task manager
Hold the Windows key + R.
In the command box that opens, type %ProgramData%/Origin then click OK.
Delete all the files and folders inside it except for LocalContent
Inside of the LocalContent folder delete the Battlefield 3 folder.
Next open Origin, allow Battlefield 3 to update, then log into Battlelog and join a server and you should be good to go.
First option you mentioned worked for me ragnarok013! Thanks so much mate! This was doing my head in for hours! Played this game over a year ago and loved it.
