Unable to log onto McAfee's web site

I've posted this in another forum section.

Running XP, 250 Gb HD, 768 Mb RAM, IE 6.026, 1.3 GHz.
I have a Google pop up blocker in place.

Using broadband, into a cable modem, then to a Linksys firewalled router (hard wired), using an ethernet cable to the router, and ethernet to two computers.

Both computers are not able to access the McAfee web sites. The message pops up that the page cannot be found.

The one computer is completely new, with NAV running on it.

I've disabled the pop up blocker on both machines.

My work computer accesses the site just fine.

All other web sites are accessed normally.

What could be the cause of just McAfee's site not being accessed?

Al