Malware Defender is a HIPS (Host Intrusion Prevention System) with low resource usage and latency. It is effective to protect your computer system from all forms of malware (viruses, worms, Trojans, adware, spyware, keyloggers, rootkits, etc.).
Malware Defender is also an advanced rootkit detector. It provides many useful tools that can be used to detect and remove already installed malware.