Editions Profil BitDefender Antivirus 2010 - 1 an, 3 PC. License quantity: 3 user(s), Number of years: 1 year(s). Minimum hard disk space: 450 MB, Minimum RAM: 512 MB, Minimum processor: 800 MHz. Compatible operating systems: -Windows XP SP 2 (32/64 bits), -Windows Vista, SP 1 (32/64 bits), -Windows 7.