Viruses and other malicious codes can do much harm to one's personal files. Upon infecting a computer, they could do a host of dastardly schemes. They could steal files, destroy important files, and do all sorts of nasty things. The solution here is to find a good antivirus software package that helps one keep unwanted invaders off one's PC. Here are some tips on finding and using these antiviral packages to obtain the optimal security against these intruders. 1. Find a complete antivirus package. Viruses have evolved beyond being simple replicating code monsters. In the past all you needed to know was that there were just a few types of viruses Trojan horses, replicating code. Today there are all sorts of malware - worms, spy ware, exploits, and other things every person has to deal with. You should go for an antivirus software that is able to handle all of these threats without the user having to have a degree in antiviral technology. Simply put, the antivirus software should be able to handle the most complex situations even if the user is "entry level". For antivirus programs to be able to do this, it should automate most of the activities required of it. Should also be able to adapt to different situations and should be able to smartly perform actions depending on the situations. 2. Updated Definition Files. Make sure your antivirus package as a means through which you can update your virus definition files online. Also, they should offer this service for free. Every day thousands upon thousands of rogue programmers develop viruses infect system either out of the whim, or for personal gain. 3. Convenient. Antivirus software attitude should be convenient enough that you don't have to devote half your day scanning for viruses. Most packages have means through which they can scan in the background so that they do not disturb you while you are working. Also they have scheduling capabilities so that they run whenever you are not using your computer actively. The software packages should also run quick enough so that they are able to anticipate and prevent the further spread of malicious codes. 4. Be a friend. Lastly be a friend and help your antivirus keep your system free from these irritating malicious softwares. The best way to do this is to make sure your computer does not get in touch with programs which does not come from trusted sources. Beware of www sites that are of dubious content that constancy percent popups urging you to press the yes button. Make sure you scan all removable hardware for viruses before you use them.