Hi there people!
Been having a problem with my Battlefield 3 Steam Edition past last week where it asks me Activate the game on origin when i try to launch multiplayer or singleplayer. 
The problem being I do not have a product key for origin since as mentioned the game is bought on steam.
Things I have tried to resolve this issue are:
Restarting my PC
Validating my Files on steam
Deleting 1 file and then Validating the game on steam
Deleting Origin Cache
Re-Installing the game
Running the game as Admin
So that leads me here asking for help due I'm not able to fix this by myself.
as a quick edit, This happens on both Battlefield 3 and Battlefield 4 Title
