These are among the most common viruses, and they tend to do the least damage. Macro viruses infect your Microsoft Word application and typically insert unwanted words or phrases. The best protection against a virus is to know the origin of each program or file you load into your computer. Since this is difficult, you can buy anti-virus software that typically checks all of your files periodically and can remove any viruses that are found. From time to time, you may get an e-mail message warning of a new virus.
Chances are good that the warning is a virus hoax .