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Common Virus Symptoms

How do you know whether your computer system has been infected with a virus? You may notice one or more of the following symptoms:

  • Your system starts performing an action totally on its own—such as sending rogue e-mail messages to people in your personal address book.

  • Normally well-behaved programs start operating erratically or crash intermittently.

  • Files you know you haven’t erased turn up missing.

  • Your system begins to act sluggish.

  • Your system fails to start.

  • Strange messages—such as You’ve been stoned—appear on your monitor screen.

  • Strange graphics appear on your monitor screen, such as bouncing balls or a simulation of your screen “melting.”

  • Strange noises (“beeps,” “boops,” “squeals,” “phfffts,” and so on) emanate from your computer’s speakers.

  • Common program files appear to have grown in size since your last analysis.


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