QUESTION!

Is there a crack for BC2 UPDATED version?

Yes, a Singleplayer crack is out. not allowed to give you the outside link.
Multiplayer hacks aren't out, and I doubt they will be.

It still says invalid cd-key with our without the crack!

there is a singleplayer crack out for the game... but as koen stated outside links = nono... no there is not multiplayer cracks out and i very much doubt there will be