My eafc24 won't lunch after anticheat show up.

I keep getting the error as of yesturday of ea saying that ''we've noticed your computer is currently offline. to activate your game on this computer ising your ea account you'll need to connect to the internet'' but heres the thing i am on he internet and always have been, i dont know how to fix this and i am looking for suggestions or reasons why this is now happening. I have not made any changes to my computer it just happened once i got back from work.