Hi, I did a search and could not find an answer, so I don't think it has
been asked before.

However we have locked down our XP SP2 desktop with ZEN Policies / ADM

It is very restrictive for the students, with no access to c:\ etc etc
In Internet explorer all seems fine, it tells you the adminstrator has
stopped access etc etc.

However when I use firefox and in the address bar type c:\ I can see
the whole file system.

Is there a way to stop this? Have we misconfigured something?
we have tried restricting it via Firefox without any success