Yahoo Inc., in partnership with Symantec Corp., launched an Internet security software suite dubbed Norton Internet Security and designed to protect online users from threats like viruses and spyware, the companies said Tuesday.

The suite includes Symantec's Norton AntiVirus and Norton Personal Firewall products. Yahoo users can try it out for free for 30 days, after which they can purchase a 12-month subscription for $49.99, which the vendors described as a "special, promotional" price.

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