Vista - Standard user account unable to access internet - mcaffee?

I have tried to find the answers elswhere, but as a relative techno-idiot, I
am struggling. I am hoping someone can help me with direct, easily
understood answers, please?
I have a standard user account for my daughter, but whenever we attempt to
use i.e it states that mcaffee has blocked inTRAnet access as it is
potentially dangerous.
What is inTRAnet? Why can't she get onto the normal internet?
I've looked at parental controls and can find no reason for this abnomally.
Please help, as she is currently using my administrator account, which has
easy access to all things nasty a la internet, and I want her to be safe
on-line.
Thanks in anticipation, K