I installed the lastest security update (KB912919) on my PC with no
problem.However, when I try to install it on my dad's PC, I don't get the
scan. (Active X is installed). Instead, I get a message that the computer in
no longer registered for updates. What does this mean? He gets automatice
updates? I'm given an option to Register the necessary files but when I try,
I get another message that tells me there was a problem encountered in
trying to access the webpage to view. What can I do?

AMD Athlon 64 Processor 3200+
2G, 480MB
XP Home Edition