This policy allows you to turn Windows Defender SmartScreen on or off. SmartScreen helps protect PCs by warning users before running potentially malicious programs downloaded from the Internet. This warning is presented as an interstitial dialog shown before running an app that has been downloaded from the Internet and is unrecognized or known to be malicious. No dialog is shown for apps that do not appear to be suspicious. Some information is sent to Microsoft about files and programs run on PCs with this feature enabled. If you enable this policy, SmartScreen will be turned on for all users. Its behavior can be controlled by the following options: - Warn and prevent bypass - Warn If you enable this policy with the "Warn" option, SmartScreen dialogs will warn the user that the app appears suspicious, but will permit the user to disregard the warning and run the app anyway. SmartScreen will not warn the user again for that app if the user tells SmartScreen to run the app. If you disable this policy, SmartScreen will be turned off for all users. Users will not be warned if they try to run suspicious apps from the Internet. If you do not configure this policy, SmartScreen will be enabled by default, but users may change their settings. Counter Measure: The most restrictive configuration for this policy setting is to select the ;amp;quot;Warn and prevent bypass;amp;quot; option. Potential Impact: If you enable this policy setting, Windows SmartScreen behavior may be controlled by setting one of the following options: - Warn and prevent bypass - Warn If you disable this policy, SmartScreen will be turned off for all users. Users will not be warned if they try to run suspicious apps from the Internet. If you do not configure this policy, SmartScreen will be enabled by default, but users may change their settings. Fix: (1) GPO: Computer Configuration\Administrative Templates\Windows Components\File Explorer\Configure Windows Defender SmartScreen (2) REG: HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\System!EnableSmartScreen