Microsoft SmartScreen
SmartScreen (officially called Windows SmartScreen, Windows Defender SmartScreen and SmartScreen Filter in different places) is a cloud-based anti-phishing and anti-malware component included in several Microsoft products, including operating systems Windows 8 and later, the applications Internet Explorer, Microsoft Edge. SmartScreen intelligence is also used in the backend of Microsoft's online services such as the web app Outlook.com and Microsoft Bing search engine.
SmartScreen as a business unit includes the intelligence platform, backend, serving frontend, UX, policy, expert graders, and closed-loop intelligence (including machine learning and statistical techniques) designed to help protect Microsoft customers against safety threats like social engineering and drive-by downloads.