The word "Malware" is short for malicious software. Malware includes computer viruses, spyware, adware, trojan horses, worms, rootkits, backdoors, keyloggers & screen scrapers just to name the main ones. This type of software is created with the intent to infiltrate or damage a computer without the computer owner's consent. Below is a short explanation of your risk with each of the main types of malware.
A computer virus is an executable program that can copy itself and infect a computer. These executable programs are carried to a target computer (the one to become infected) in a variety of ways such as sent over the internet or on a disk, CD, DVD or USB drive. Viruses rely on user intervention to spread such as opening an infected file, document or email.
A Trojan is a non-self-replicating software that appears to the user as a program that will perform something the user desires but instead gives others unauthorized access to the user's computer system. Once a Trojan has been installed the hacker who targetd the user may be able to remotely do a variety of things such as stealing sensitive files, viewing the user's screen, typing on the user's computer, logging the user's keystrokes to capture sensitive information such as username and passwords to other software or websites.
These types of programs are for-profit programs designed to monitor a users browsing habits and display unsolicited advertisments via popups, new browser windows or redirecting the user's browsers to other sites in an effort to force the user to a site where the creator of the spyware will profit. Spyware programs are most often contained in peer-to-peer applications such as in illegal music or file sharing applications.
Simple to use and automatic daily updates ensure continuous protection against all types of malware and spyware. Avast is tried and trusted with over 80 million users. Supports all windows versions from "Windows 95" to "Windows 7".
Over the years I have bought and tried most of the other major anti-virus programs out there. Each had a few nice features but in the end either didn't fully protect me or installed a number of other programs that caused my computers to run slow or become unstable. Most often the only resolution to fix has been to completely uninstall the other virus software.
A collegue introduced me to Avast!® a couple of years ago. Since the first time I purchased Avast I have had no issues with any of my computers. In my two years using Avast it has been nothing short of top notch!
The program and virus definitions are automatically updated very frequently. In my experience the virus definitions update a couple or times each day as threats are discovered! And the program itself seems to update at least weekly if not a couple or more times a week.
The guys at Avast are definitely on their game! Avast is the first malware/antivirus product that I've had total confidence in. I feel safe knowing that the staff at Avast!® is constantly working to keep my computers safe.