Avast Free Antivirus is authentic antivirus software resolution made to give PC users an efficient security against spyware and viruses. It has a well designed interface which helps beginners as well as experts to know about its features clearly and easily. After being installed it just works with a faster speed and regularly updates its virus definition. It comes with dedicated tools which help in protecting several applications running on ones computer. It has a web shield which helps in scanning all the websites that the user visited and also scans all the files and pages downloaded. It also helps in checking all the incoming and outgoing mails from user’s computer.