Is PC failure among your deepest fears? Loss of data was cited among the top three "realistic fears" by 59% of 1,200 small-business owners in a poll by Working Solo Inc., a consulting firm in New Paltz, N.Y. Antivirus and data backup software are the third and fourth most popular programs among small businesses, after word processing and spreadsheets, adds International Data Corp. A few owners eschew the most common backup methods (table) in favor of printouts, a second computer, or compact disks.

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