I have a similar problem to Jahan's.
Sometimes my Internet Explorer will not connect. I get the error "Page
cannot be displayed". This might last for a few days, then all of a sudden
it comes back to life and connects.
I am running XP Professional version 2002, Service Pack 1 and IE version
I have a 1.8 ghz Pentium 4 pc with 512mb ram
I am using Norton Internet Security Professional and check for updates
I am on a broadband network using a cable modem.
I know the connection is ok because when I am prompted by Microsoft to
download the latest update, they in fact do download and install.
My broadband service provider assures that my cable modem is functioning
Any advice you can give me will be appreciated. Obviously I can't depend on IE
to be there when I need it.