"Ice Source Defense Line" is a professional anti-Trojan software developed by the Ice Source Network Security Lab for personal computer users. It specializes in detecting and eliminating popular QQ Trojans, worms, online game account theft programs, and hacker backdoor programs. It also provides high-intensity protection for computers with its uniquely created special defense module. During use, users will significantly notice the improvement in security, especially when surfing the Internet and dealing with web-based Trojans. Additionally, compatibility with other antivirus software running in parallel was considered from the initial design phase. All software designed and released by our lab (Ice Source Network Security) is primarily research-oriented and absolutely does not carry any rogue plug-ins. Users can feel assured while using it.