If it finds a match, SmartScreen Filter will warn you that the download has been blocked for your safety.

SmartScreen Filter checks files that you download from the web against a list of reported malicious software sites and programs known to be unsafe.

If it finds a match, SmartScreen Filter will show you a warning notifying you that the site has been blocked for your safety.

SmartScreen Filter checks the sites you visit against a dynamic list of reported phishing sites and malicious software sites.

If it finds suspicious webpages, SmartScreen will display a message giving you an opportunity to provide feedback and advising you to proceed with caution.

As you browse the web, it analyses webpages and determines if they have any characteristics that might be suspicious.SmartScreen Filter helps to protect you in three ways:

SmartScreen Filter can also help protect you from downloading or installing malware (malicious software). SmartScreen Filter is a feature in Microsoft Edge that helps detect phishing websites. It is designed for Windows 10 to be faster, safer, and compatible with the modern Web.

Microsoft Edge is a new web browser that is available across the Windows 10 device family. How to Enable or Disable Bypassing SmartScreen Prompts for Sites in Microsoft Edge in Windows 10

Microsoft edge smartscreen