A software program that scans your computer for viruses. A virus scanning program is an absolute necessity these days, and McAfee provides one of the best. A solid, intuitive graphical interface simplifies the scanning process. VirusScan even runs in the background, allowing you to continue your work (or play) while it does its job. You can configure the scanning levels (by specifying file types) and print the activity logs. Those features-and the fact that McAfee updates this software very frequently-make VirusScan a popular tool.