McAfee AntiVirus Plus 2012, 3u, RTL, Box, ENG. Software type: Box, License quantity: 3 user(s). Minimum hard disk space: 500 MB, Minimum RAM: 512 MB, Minimum processor: 1GHz. Compatible operating systems: Windows XP SP3+ (32-bit) Windows Vista SP1+ (32/64-bit) Windows 7 SP1+ (32/64-bit)