Avast antivirus combines four real-time shields; File Shield, Web Shield, Email Shield and Behavioral Shield to offer comprehensive protection against today’s threats and keep your business moving seamlessly. Verifies web certificates, scans emails in your inbox to ensure they are free of malware, and provides real time monitoring of all programs running on your PC..File Shield: Stops threats and keep your business moving. File Shield quickly scans files that are launched on a PC to ensure they’re free of malware.Behavior Shield: Provides real-time monitoring of all programs currently running on your PC. If it notices a behavior out of the ordinary (e.g. a PDF trying to access a web link) it blocks the action and reports the behavior to you..Email Shield: Free your workforce to surf, search and email with confidence. Email Shield scans emails in your inbox to ensure they’re free of malware..Web Shield: Web Shield scans both HTTP and HTTPS sites for malware and other dangers, even verifying website certificates, without disrupting your browsing experience.