North source anti-virus system constitute an important component of HDGUARD & VRV, are an object-oriented all-Chinese windows antivirus software, including DOS and WINDOWS versions.

• 北信源反病毒体系的重要构成部分 HDGUARD&VRV ，是一种面向对象的全中文窗口杀毒软件，包含DOS及WINDOWS版本。