Try this tutorial: http://battlelog.org/bl/tutorial_update-punkbuster-manual_26
And just to be clear. Even though punkbuster is a 32 bit program, it has no problems running on a 64 bit OS compared to a 32 bit OS. The program is so small that it as a 32bit program actually might run better on a 64bit OS than it would if it was a 64bit punkbuster.
Punkbuster has many problems running on 64 bit OS, since Battlefield Heroes crashes on more powerful 64 bit computer and runs well on slower 32 bit computer.
I didn't get anymore answers for a while and I am dissapointed of the tehnical support.
Or it might be a driver issue unrelated to Punkbuster but related to your x64 computer and not x32 computer.
No, it's not a driver issue because Battlefield 3 runs fine on the x64 computer with punkbuster disabled.
With punkbuster it runs slower for 5-10 min and then it freezes the whole computer.
