Windows XP (SP3), Vista, 7 (SP1), 8, or 8.1. Processor: 1 GHz or higher. RAM: 1 GB for 32-bit systems or 2 GB for 64-bit systems. Hard Disk Space: At least 480 MB of free space.
Before installing Kaspersky Internet Security 2015, ensure your computer meets the system requirements: kaspersky internet security 2015 installation