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Have you updated punk buster this way....
Go to Punk Buster site
Download PB then extract files to your desktop then open Punk Buster folder. Click on the PB setup and it will open.
Add your BF3 game to punk buster its at the top of Punk Buster.
Then update punk buster again at the top of Punk Buster.
http://www.punkbuster.com/index.php?page=pbsetup.php
Yes exactly like you described it
I thought you did but wanted to be sure. In truth I have no idea if this can help at all but it will rule out other programs making the issue with punk buster so worth a shot just to try and pin point what is going on. So try this and then test the game, good chance it may not help at all but I have seen some crazy things over the years with PC games fix them so this is why I thought of this.
Run a Clean Boot: http://help.ea.com/en/article/how-to-clean-boot-your-pc/
This should ensure that no programs are interfering in the background.
