These are the most common cause of infection, and they become active only when the PC is booted. Multi-partite infectors target both file and boot sectors. The new Macro viruses currently affect documents written in Microsoft Word. They are the first known viruses to work across platforms infecting both PC and Macintosh systems. Solutions to your particular situation could involve something as simple as a obtaining a copy of a recognized anti-virus software product and loading it in your machine, to something as complex and expensive as a server based software that scans all the computer in your organizartion, and reports any problems to the network administrator.
Cost is the main difference between anti-virus systems.
In the meantime, there are some preventative measures you can take. For example, you should protect your machines with a commercial Anti-Virus Program like the ones mentioned above. Always scan diskettes and Internet files before using them. However, we are all careless at one point or another, and we unwittingly infect our computer. The information on this page is presented best using an Internet browser like Netscape Navigator or Microsoft Internet Explorer fullscreen , with a 12 point general fontsize.