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Free McAfee Livesafe Antivirus for 12 months. It's a targeted offer for ADT Security customers but doesn't appear to be enforced in any way.
You have to delete any existing McAfee antivirus off your PC completely first using their McAfee Virtual Technician software — https://mvt.mcafee.com/mvt/en-us/default.html?en-us
(must be downloaded from the Canada/USA website. Either choose MacAfee.CA or choose Canada/USA site, otherwise it won't download.)
I found out about this deal because I bought 12 months of McAfee off some guy on eBay and it turned out what he was doing was signing up for these ADT 12 month deals and selling them on eBay. I felt a bit scammed by him so I thought I'd blow his method out to the OzB community so everyone could get it without paying on eBay.
Looks like to sign up you do need to put in your credit card for the auto-renewal and then remember to cancel before your 12 months is up. The scammer dude on eBay probably puts in bogus card details I'm guessing (which I definitely do not suggest you do!)
I chose PayPal and it asked me for a three digit number from my card? Made one up and sign up confirmed successful.