I read some good reviews for Panda Software antivirus. Do your own due-dilligence. The reason this is a deal is because they have visaperks.ca deals (personal and business cards, separate deals each).

Personal = 25% off:
http://visaperks.ca/visaperks/offer....&offertype=all

Business = up to 35% off:
http://visaperks.ca/business/offer.c...215&category=1

Some (all?) of their anti-virus software covers 2 machines.