Panda Free Antivirus software version 20.1 is a reliable and efficient tool for protecting your computer against viruses, malware, and other threats. The software features real-time protection against all kinds of threats and a behavioral analysis system that detects and blocks suspicious activities. It also includes a USB protection feature that automatically scans USB devices when they are connected to your computer. In addition, the software is easy to use and does not require much system resources.