What you need to know about Windows Security in Windows 10 What you need to know about Windows Security in Windows 10 From the firewall to antimalware to ransomware protections: here's an overview of what's inside of Windows 10's Windows Security Credit: Mark Hadhman / IDG Microsoft’s Windows Security acts like an airbag: It will protect you, regardless of whether you know it exists. You’ll find a number of technologies grouped within the Windows 10 Settings menu, all designed to secure your PC from malware. Our video walks through the basic components of Windows Security, from the antimalware technologies built into Windows Defender all the way up through the browser security features associated with Microsoft Edge. We show you what each feature does, and if there are any changes you’ll need to make to better secure your PC.