Kaspersky Lab Internet Security 2009, 1-Desktop, 1 year Subscription (PC). Software type: Box, License quantity: 1 user(s), Number of years: 1 year(s). Minimum hard disk space: 50 MB, Minimum RAM: 256 MB, Minimum processor: 300 MHz. Compatible operating systems: Windows XP Home (SP 2), Windows XP Professional (SP 2), Windows XP Professional x64,