Kaspersky Internet Security - Real-Time Behavior Analysis
Kaspersky Internet Security prevents infections by monitoring your
computer for any malicious behavior. If detected, Kaspersky immediately
alerts you and rolls back any malicious changes, including restoring
files encrypted by ransomware.

System Requirements
Intel® Pentium® III 800MHz or faster processor (Pentium 4/ Intel Centrino, multiprocessor recommended)
Microsoft Windows 2000 Professional (Service Pack 4 or higher), Microsoft Windows XP Home Edition (Service Pack 2 or Higher), Microsoft Windows XP Professional (Service Pack 2 or higher), Microsoft Windows XP Professional x64 Edition, Microsoft Windows Vista, Microsoft Windows Vista x64.
256MB of RAM
50MB of available hard-disk space required for installation
An Internet Connection
DVD OR CD ROM drive
Microsoft Windows Installer 2
Microsoft IE 5.5 or higher
An Internet Connection
DVD OR CD ROM drive
Microsoft Windows Installer 2
Microsoft IE 5.5 or higher