Antivirus software such as Avira Free Antivirus constantly monitors your system in real time, helping you to protect it from malware such as viruses, worms, Trojans, and ransomware. You can also run regular system scans and check your device for malware. If the virus scanner detects a suspicious file, its digital fingerprint is uploaded to the Avira Protection Cloud where it is checked in real time against the immense, ever-growing threat database. The file is then moved to the quarantine if it is classified as infected, rendering it harmless. Avira Free Antivirus Pro performs a signature-based and heuristic (activity-based) analysis, enabling it to also detect as-of-yet unidentified ransomware. In addition, it comes with an advanced web protection feature.