The above-mentioned Symantec site does not say anything about 32-bit OS on 64-bit processor.
It says "...64-bit processors and operating systems."
Which is what I have on one PC wherein USB drives ARE blocked within the package's ADC policy and will not appear and I want to UN-do this...I already unsuccessfully tried moving the PC to a different client group with a different policy.
Tomorrow I plan to re-install to the same PC the 32-bit client with a different policy that does not block USB drives and see what happens.
I can also make and install a package without ADC enabled...32-bit as the OS on this PC is XP SP3.
I know I'm being picky so I will continue testing etc. and try to post my results here.
Thank you, Tom