Same thing...I noticed that PnkBstrB.exe was shutting down too. I'll reboot my system & check my services & there it is with ""A.exe & they're both set to automatic. But, it will disappear after a couple of minutes & I can't restart the service without rebooting my comp. I am the admin on my system & both A & B are allowed through firewall. I've updated my drivers, reinstalled PB, etc. but am still having this issue. A friend that plays has had no problems at all with it & I was asking him about his process list in task manager & his services list. He said neither A or B were running in task manager but both were running in services. "A" runs in my task manager & services but "B" is no where to be found on either. I'm running XP & he's running Vista, but I really don't think that has anything to do with it.
I'm definitely NOT trying to cheat or hack...I just want to play the game!!