Luke, the blank screen did stand for a very long while.
I have rebooted my machine recently, and it still prompts for the registration to be completed by the "product setup" process, which it still fails to undertake successfully.
I have checked my wife's account, and it now shows the product, but it has not "handshaked" with the online service via the product setup and doesn't show any expiry date on the main menu of mcafee.
Without this "handshake" will my product not cease to receive updates after the 12 day initial period?
I am still convinced that mcafee have a server problem, as when installing this on my father in laws machines last week I never once got a delay in product registration.
Any ideas how I get this problem fixed, or if the servers have a problem which will be overcome when someone addresses it?