Kaspersky AV 1+1 User

Essential PC Protection: Kaspersky Anti-Virus is the backbone of your PC’s antivirus security system, working behind the scenes to deliver the fastest and most trusted computer virus and spyware protection in the world.

System Requirements:
Microsoft Windows 8.1 /Pro/Enterprise/update (32-bit or 64-bit**) .
Microsoft Windows 8 /Pro/Enterprise (32-bit or 64-bit**).
Microsoft Windows 7 Starter/Home Basic and Premium/Professional/Ultimate SP1 or higher(32-bit or 64-bit**).
Microsoft Windows Vista Home Basic and Premium/Business/Enterprise/Ultimate SP1 or higher (32-bit or 64-bit**).
Microsoft Windows XP Home/Professional (32-bit) SP3 or higher or XP Professional (64-bit**) SP2 or higher

Hardware Requirements:
CPU: 1 GHz 32-bit (x86) / 64-bit (x64)
RAM: 1 GB (32-bit) or 2 GB (64-bit)

Microsoft Windows XP Hardware Requirements:
CPU: 800 MHz or higher
RAM: 512 MB