(If the number they generate matches the one for the software, it means that it hasn’t been messed with. This process involves checking the resulting hash value with information Microsoft keeps on file.

Windows SmartScreen sends the hash information to Microsoft’s servers.

This hash - basically, a long string of numbers that identify that unique file - is a way for the tool to determine whether the software was signed by a known and trusted developer or publisher.

Windows Defender SmartScreen computes a cryptographic hash value for the file.

Let’s break down how it all works into a little more simple terms. The hashing verification process can be a bit complex. How SmartScreen Checks the Integrity of a Signed Software Windows Defender SmartScreen also looks at items you download from the Microsoft Store to try to prevent you from downloading and installing anything malicious. It also warns you of suspicious and dangerous websites.Ĭhecks the software and other files you download from the Microsoft Store. This browser-based tool looks for malware and PUAs in the files you download using Microsoft web browsers (like Internet Explorer and Edge).

Analyzes websites you visit and files you download in Microsoft Edge.This includes checking software-based threats (such as malware and potentially unwanted applications, or PUAs) that you have on your computer or download from third-party stores. Checks software applications and files that you attempt to install.

But Windows SmartScreen attempts to protect you both during and before starting the installation process in three key ways: Most types of malicious software (malware) require you to install them before they can cause harm to your device. Its purpose is to protect your PC by preventing you from visiting dangerous websites and downloading and/or installing malicious software programs.

This reputation-based protection tool is part of Windows Defender, your operating system’s built-in antivirus program, and serves as an alert system. Windows Defender SmartScreen is your computer’s version of a superhero - it fights evil by working both in your browser and on your computer to identify and protect you from bad websites and software programs. But what is Windows Defender SmartScreen? What does it do and how does it help keep you safe online? What Is Windows Defender SmartScreen?

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