The Bottom Line on Bots

Does your computer act like it's possessed? Millions know what you're feeling. We asked an expert at security software maker McAfee to shed some light

Sometimes my computer seems to have a mind of its own. It inexplicably changes from a dutiful servant to a willful spirit capable of cruelly holding a document hostage. Occasionally, I get strange messages about undeliverable e-mails that I would swear I didn't tell it to send. More than once, it has even behaved as if it were busy, although I haven't asked it to do anything.

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