Microsoft's latest anti-malware application uses the same engine as OneCare but is smaller, faster and more efficient than its predecessor

The just-released beta of Microsoft Security Essentials is a solid, free tool that protects against malware while taking up few system resources and staying out of your way as much as possible.

This is set-it-and-forget-it software that handles the basic dangers but doesn't try to compete with big-boy security suites such as those built by Symantec, McAfee or Panda.

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