I've had two emails today from McAfee telling me my subscription has expired, and providing me with a link to register my software and continue being protected from viruses.
Guess What? it's a scam ! usual indicators, spelling mistakes/bad grammar, email from someone other than McAfee, and I haven@ had McAfee for donkey's years.
Apparently there's also a slightly more sophisticated scam email doing the rounds for Norton anti virus, which looks like an invoice.