The search engine's Web-crawling spider now keeps an eye out for viruses and malware as it combs the Web, and shows users a warning page before allowing them to access malicious sites.

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It will be a free site that uses algorithms to build profiles based on users' preexisting Web-crawling information.

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Webaroo's computer scientists in Mumbai and New Delhi cranked out dozens of Web-crawling algorithms that decipher the necessary and truly informative stuff.

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