Digital Defense — The Best Ways to Secure Your LIfe Online

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How do I keep my laptop virus-free?
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How do I keep my laptop virus-free?

No matter how careful you are with what you download or click, your computer is an easy target for old-school viruses that erase data, or more cutting-edge attacks like ­ransomware — programs that demand money in order to restore access to your suddenly walled-off  hard drive. Mac users can get by with occasional checkups using Bitdefender's Virus Scanner (free; For PCs, the best defense is McAfee's LiveSafe ($80 a year;, which will block viruses and warn you about risky websites.

Expert Tip: Activate two-factor authentication for financial accounts to thwart Trojan viruses that steal passwords.

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