Buy cheap norton internet security 2013 product key online?

All friend, I buy a new laptop yesterday, and I need a antivirus software to protect it, which antivirus software you think is the best? My classmate say norton is the best, but it's expensive for me, can someone give me a site which can get it at a low price? Only product key is OK, I can download it from... show more All friend, I buy a new laptop yesterday, and I need a antivirus software to protect it, which antivirus software you think is the best? My classmate say norton is the best, but it's expensive for me, can someone give me a site which can get it at a low price? Only product key is OK, I can download it from norton website, Thanks.
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