Welcome to the next generation of the #1 Ranked Antivirus Technology. Bitdefender PC Lifetime Edition has been designed to be used on one computer. Since the product license key is tied to the computer where it’s first installed, it cannot be transferred to another computer. Bitdefender Internet Security 2013 builds on highly awarded technology to ensure secure e-banking and e-shopping, online safety for kids, privacy protection on social networks and more! #1 ranking based on reviews from AV Test, AV Comparatives,CNET Downloads, PC Welt, Expert Reviews and many more.