Battlefield 3 won't allow me to play Multiplayer or Campaign

i suggest you right click on origin and go to its Properties” option Next select the “Compatibility” tab, and Select the “Run the Program in Compatibility Mode” option., and theres a drop down box if your running windows 7,  u should select windows 7 and at the bottom of this tab is a run as admin check box, check that aswell and hit apply and hit ok, then launch the game 

Let me know if this works for you, if not i will see what else i can do to help you out,

Best Of Luck