Panda Antivirus Pro 2012, 3u, 1y, ENG. License quantity: 3 user(s), Number of years: 1 year(s). Minimum hard disk space: 265 MB, Minimum RAM: 128 MB, Minimum processor: Intel Pentium 300 MHz. Compatible operating systems: Windows XP (32-bit) Windows Vista (32/64-bit) Windows 7 (32/64-bit)