2. VIRUSES AND SECURITY  In an information-driven world, individuals and organization must manage and protect against risks such as viruses, which are spread through electronic communication.

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4. VIRUSES  A viruses is a program that has been written, usually by a hacker, to cause corruption of data on a computer. The virus is attached to a file such as a program file, a document, or an e-mail message, and spreads from one file to another once the program is executed.

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6. VIRUS VOCABULARY  A worm makes many copies of itself, resulting in the consumption of system resources that slows down or actually halts tasks. Worms don’t have to attach themselves to other files.  A time bomb is a virus that does not cause its damage until a certain date or time the system has been booted a certain number of times.  A logic bomb is a virus triggered by the appearance or disappearance of specified data.

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8. PROTECTION AGAINST VIRUSES  Use antivirus software. This software should always run on your computer and should be updated regularly.  Be careful in opening e-mail attachments. It is a good idea to save them to disk before reading them so you can scan them.  Do not access files copied from USB drives, other media, or download from the Internet without scanning them first.