Macro viruses attack a variety of programs, but the most notable and noteworthy are the ubiuitous Microsoft Word, Excel, and PowerPoint.
You don't have to write a macro in these programs in order to be attacked by a virus. The fact that the programs can be modified by means of a macro means that anybody could add a micro - or another modification - to your program.
For this reason, some people do not exchange Office files with others. This does present limitations especially for executives or those in the writing trades who must exchange files with others. Some people like to check translation or editing jobs on their screen, and then they prefer to exchange the material back and forth.
There is a solution to this problem. Some people keep a spare computer on hand for working with potentially virused materials. This computer does not replace the second, backup computer recommended elsewhere in this website.
Not all viruses affect your programs in the same way. A common series of viruses tells you to delete a necessary file from Windows. It isn't even a virus at all, but it does the same damage as a virus.
It causes you to damage your perfectly good Windows program!
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