Editions Profil Upg Maj BitDefender Internet Security 2011. Software type: Upgrade, License quantity: 2 user(s), Number of years: 3 year(s). Minimum hard disk space: 1024 MB, Minimum RAM: 1024 MB, Minimum processor: Intel Core Duo 1.66 GHz. Compatible operating systems: Windows XP, SP3 (SP2 x64), Vista (SP1), Windows 7