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Microsoft Defender SmartScreen provide an early warning system against websites that might engage in phishing attacks or attempt to distribute malware through a socially engineered attack. If the file isn't on that list, Microsoft Defender SmartScreen shows a warning, advising caution.īenefits of Microsoft Defender SmartScreen If it finds a match, Microsoft Defender SmartScreen shows a warning to let the user know that the site might be malicious.Ĭhecking downloaded files against a list of files that are well known and downloaded by many Windows users. Microsoft Defender SmartScreen determines whether a downloaded app or app installer is potentially malicious by:Ĭhecking downloaded files against a list of reported malicious software sites and programs known to be unsafe. If it finds a match, Microsoft Defender SmartScreen shows a warning to let the user know that the site might be malicious. If Microsoft Defender SmartScreen determines that a page is suspicious, it will show a warning page to advise caution.Ĭhecking the visited sites against a dynamic list of reported phishing sites and malicious software sites. Microsoft Defender SmartScreen determines whether a site is potentially malicious by:Īnalyzing visited webpages and looking for indications of suspicious behavior. Microsoft Defender SmartScreen protects against phishing or malware websites and applications, and the downloading of potentially malicious files.