SmartScreen is a security feature that was introduced in Internet Explorer 8 to help protect against malicious websites. In Windows 8.1 it was introduced to the desktop level and warn you before running unrecognized apps from the Internet that could potentially be unsafe. This security layer is built into Windows 10, too.
If you’re an experienced power user, you should already know what’s safe and what isn’t when it comes to downloading and installing apps. So, you don’t need the annoyance of the SmartScreen filter always popping up when you’re about to install something.
Important Note: If you’re new to Windows 10 or a novice user, I recommend not turning off SmartScreen. It does help protect you from installing malicious software. Also, Microsoft has improved the SmartScreen Filter in Windows 10 to integrate with Microsoft Edge and IE 11 to help keep you safe from malicious websites.
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