Re: BF4 won't launch
skyttnator, oh man I cannot belive you are still having problems!
I've asked before, but in TASKMANAGER and PROCESSES is PnkBstrA.exe showing up? If not then Punkbuster is your problem.
Avast can have problems with Bf4 for some bizarre reason so double check that Bf4.exe, the entire Bf4 folder, the Bf4 folder in your C/Documents folder, Origin and its folder, Pnkbuster and its folder (basically anything connected to BF4 - espceially any file Bf4/Origin-related ending in .exe) is allowed through your Avast anti virus and any firewall.