CyberDifender Cyber-Defender is a network that automatically discovers and blocks mass-spreading viruses in real time. All Cyber-Defender users will be protected within minutes after the first user reports a new, anomalous program and it's verified by the AppHunter autosystem in the Alert center. This is the best companion program for any antivirus software, which may take hours or days to update virus-definition data in your machine after a new virus is discovered. For beginner users, you just need to install the program; there's no need to take any action for automatic protection. For advanced users, you may watch the process, module, and start-up programs and proactively protect yourself from adware and spyware.