I run but never walk. I sweep but do not mop. I quarantine but am no cop. What am I?

This clever riddle perfectly describes the essential work of anti-virus software. When a program "runs," it executes its functions on a computer, much like a person runs a race. Anti-virus programs are constantly running in the background, diligently monitoring your system for any signs of trouble. Unlike a physical entity that walks, software exists purely in the digital realm, performing its tasks without physical movement.

The clue "I sweep but do not mop" refers to the scanning process that anti-virus programs undertake. They systematically "sweep" through your computer's files, folders, and memory, searching for known malware signatures or suspicious behaviors. This sweeping action is a thorough examination, not a cleaning like mopping, but rather an identification of potential threats. When a threat is detected, the software acts to neutralize it.

Finally, "I quarantine but am no cop" highlights another critical function. If an anti-virus program identifies a suspicious or infected file, it can "quarantine" it. This means moving the file to a secure, isolated location where it cannot harm your system or spread infection, effectively containing the threat without deleting it immediately. This allows for further analysis or safe removal, much like a health official might quarantine an individual to prevent the spread of a disease, rather than a law enforcement officer making an arrest. Ultimately, anti-virus software serves as your digital guardian, protecting your devices from malicious attacks.