Symantec UPG Norton AntiVirus 2011, FI. Software type: Upgrade, License quantity: 1 user(s), Number of years: 1 year(s). Minimum hard disk space: 300 MB, Minimum RAM: 256 MB, Minimum processor: 300 MHz. Compatible operating systems: - Microsoft Windows XP (32-bit) Home, Professional, Tablet PC, Media Center (32-bit) SP 2.