Kaspersky Lab Small Office Security 5 PCs, 1 Year (Retail Boxed). Software type: Box, License quantity: 5 user(s), Number of years: 1 year(s). Minimum hard disk space: 50 MB, Minimum RAM: 64 MB, Minimum processor: 300 MHz. Compatible operating systems: Windows Vista, Windows Vista x64, Microsoft Windows 2000 Professional (SP 4),