SAN FRANCISCO, Feb. 15 -- Stepping up its fight against computer threats at the risk of alienating security businesses, Microsoft Corp. announced Tuesday it will give away a program to combat privacy-stealing and PC-clogging spyware and other virtual pests.
Microsoft co-founder Bill Gates also unveiled plans to release antivirus tools for consumers and make a major security upgrade to its Internet Explorer Web browser. At the same time, he showed off new software for businesses to combat security threats.
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The moves are part of a wide-ranging effort by the world's largest software maker to improve the security and reliability of its Windows operating system and other programs, which have become favorite targets of hackers, virus writers and other malware creators.
Speaking at the annual RSA Conference, a major gathering of computer security experts, Gates outlined successes over the past year but did not suggest total victory was imminent or even possible. Microsoft has distributed more than 170 million copies of a major security enhancement to Windows XP since its release last year, but Gates said more work is needed.
"It's a challenging area and new threats seem to be emerging all the time," Gates said. "But I'm optimistic . . . we'll be able to mitigate the security problems and therefore let the advances of this digital infrastructure allow for fantastic things to happen."
Gates said spyware and adware threats are growing more quickly than worms and viruses. The programs that track Web surfing, generate pop-up ads and slow systems are often installed when users try to run free software without reading the license agreement. Later versions also have taken advantage of known Windows flaws to sneak onto machines.
"Spyware . . . is something we need to nip now," Gates said.
In December, Microsoft purchased Giant Company Software Inc. and turned its offering into Microsoft AntiSpyware. Gates said more than 6 million copies of a free "beta," or test, version have been downloaded.
Besides the consumer software, Microsoft will sell tools that are better suited for businesses where administrators need more control over their computers.
But numerous companies are already selling or giving away programs for cleaning machines of the unwanted programs. Microsoft's decision to give its software away is reminiscent of its decision to bundle an Internet browser and media player with Windows -- something that landed the company in legal hot water both in the United States and Europe.