New computers almost always come loaded with the trial version of a software suite designed to thwart spam, viruses, and spyware. But our new tests show that not all suites deliver enough protection to justify paying $50 or more for continued protection after the trial period. We also found spotty performance by some antiphishing toolbars built into suites and integrated into browsers. 

You should use the suite that came with your new computer during the trial period to ensure protection right away. Then follow these steps to decide whether to renew it, switch to another pay suite, or opt for free protection.