---
title: Windows operating system security
description: Securing the operating system includes system security, encryption, network security, and threat protection.
ms.reviewer: 
manager: dansimp
ms.author: deniseb
ms.prod: w10
ms.mktglfcycl: deploy
ms.sitesec: library
ms.pagetype: security
author: denisebmsft
---

# Windows operating system security

Security and privacy depend on an operating system that guards your system and information from the moment it starts up, providing fundamental chip-to-cloud protection. Windows 11 is the most secure Windows yet with extensive security measures designed to help keep you safe. These measures include built-in advanced encryption and data protection, robust network and system security, and intelligent safeguards against ever-evolving threats. 

The operating system security features in Windows 11 include:

- System security
    - Trusted Boot (includes Secure Boot and Measured Boot)
    - Cryptography and certificate management
    - Windows Security app
- Encryption and data protection
    - BitLocker
    - Encryption
- Network security
    - Virtual Private Networks (VPNs)
    - Windows Defender Firewall
    - Bluetooth
    - DSN security
    - Windows Wi-Fi
    - Transport Layer Security (TLS)
- Protection from viruses and threats
    - Microsoft Defender Antivirus
    - Attack surface reduction
    - Tamper protection
    - Network protection
    - Controlled folder access
    - Exploit protection
    - Microsoft Defender for Endpoint