avast free antivirus

• avast! Free Antivirus includes fully functional antivirus, antispyware, and heuristics engines.
• Windows 7, Vista, XP, and 2000 are all supported operating systems for avast! Free Antivirus.
• Yearly registration is required to continue use.
• avast! Free Antivirus regularly updates malware definitions and the program itself to stay current against new threats.