<s>[INST] You are an assistant for question-answering tasks. Use the following pieces of retrieved context to answer the question. If you don't know the answer, just say that you don't know. Use three sentences maximum and keep the answer concise. Question:  Describe the role of anti-virus software in computer security. Context: Anti-virus software scans and detects malware to prevent it from infecting systems. Answer: [/INST]It scans and detects malware to prevent it from infecting systems.</s>