Hackers controling PCs while users remain unaware

A few weeks ago Candace Locklear's office computer quietly started sending out dozens of instant messages with photos attached that were infected with malicious software. She was sitting at her desk, with no sign that the messaging software was active. By the time she figured out what was going on, several friends and colleagues had […]

A few weeks ago Candace Locklear's office computer quietly started sending out dozens of instant messages with photos attached that were infected with malicious software.

She was sitting at her desk, with no sign that the messaging software was active. By the time she figured out what was going on, several friends and colleagues had opened the attachments and infected their computers.

It took eight hours for a technician to clean up her computer. But because the malicious software worked so secretly, she's still not convinced that all's clear.

"I'd like to think that it's gone. But I just don't know," said Locklear, 40, a publicist in San Francisco. "That's what is so frustrating."

Computer security experts estimate that tens of millions of personal computers are infected with malicious software like the one that attacked Locklear's machine. Such programs, generally classified as malware, attack companies along with consumers.

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Hack, Hacker, Hacking, Intrusion, Malicious Activity