If you played bf4 in the last 24 hours and your not banned your very lucky
Punkbuster introduced a new banwave yesterday plus there was a origin update
this is causing legit players to be banned there has been alot of banns in the last 24 hours http://www.pbbans.com/mbi-view-all-bf4-bans-44.html
You will notice on bf4 battlelog this message: WE ARE INVESTIGATING A RECENT UNWARRANTED PUNKBUSTER BAN. WE ARE WORKING TO RESOLVE THE ISSUE AS SOON AS POSSIBLE. THANK YOU FOR YOUR PATIENCE.
And there is alot of complaints on EA forum so there is a problem with punkbuster i advise not playing until the problem has been resolved
with punkbuster and origin.