I am using Win 98. I have just tried to install Norton Anti Virus over the
top of Anti Virus 2004 using their automatic installation proceedure. I get
part way through the process and then the message "The setup was unable to
update the MSI System component" appears and it refers me to Microsoft for
help. I have had a look at the FAQs but can't find anything that helps.

I'd be very grateful for any help anyuone can offer with this problem.

Robert