Avast 7.0 latest version........

What's new in Avast! Free Antivirus 7.0.1474:

Operating Systems Supported !

• Windows 8 (any Edition, 32-bit or 64-bit)
• Windows 7 (any Edition, 32-bit or 64-bit)
• Windows Vista (any Edition excl. Starter Edition, 32-bit or 64-bit)
• Windows XP Service Pack 2 or higher (any Edition, 32-bit or 64-bit)
• Microsoft Windows 2000 Professional Service Pack 4

Minimum Hardware Requirements !

• Pentium 3 Processor
• 128 MB RAM
•  200 MB of free hard disk space. 
•  For best results, remove any other antivirus software from your PC before installing avast!