I wonder if you meant they can't install the Adobe Reader?
Which is true and proper for your selected security model. Fix? Install the reader for them with a proper account.
cannot be downloaded and read by limited users. Is there a way for limited users to be able to do this? I would allow this for school work. I can download them on my account and then put them in their folder. They can then open them.
Windows XP SP2
Zone Alarm FREE Firewall