AVG Anti-Virus 9.0, 3u, 1Y. License quantity: 3 user(s), Number of years: 1 year(s). Minimum hard disk space: 350 MB, Minimum RAM: 512 MB, Minimum processor: Intel Pentium 1.50 GHz. Compatible operating systems: Windows 98/Me/NT/2000/XP/Vista/7 Windows NT Server 4.0 Windows 2000 Server Windows 2003 Server