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Windows Defender Official Download Page

Security · v4.18.2308.7 · Freeware

Comprehensive security solution for Windows devices

Download link verified by (Editor) on — links go directly to the official source from Microsoft Corporation.
License: Freeware
Size: 150 MB
Platforms: Windows
Updated:

Official source from Microsoft Corporation — final package type is controlled by the vendor

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🪟 Windows Defender for Windows Official download page download page (150 MB) #security #antivirus #malware protection #windows #software #microsoft #firewall #enterprise

Download Summary

Source

Microsoft Corporation official download page

Platforms

Windows

Current listing

v4.18.2308.7 · 150 MB

Windows Defender Overview

Windows Defender offline installer provides a standalone security solution developed by Microsoft Corporation. This tool is designed to protect Windows devices from various threats, including malware, spyware, and viruses. The current version, 4.18.2308.7, reflects continuous improvements in threat detection capabilities. The offline installer is particularly beneficial for environments where internet connectivity is limited or non-existent, ensuring that users can still maintain robust security measures without needing to download updates in real-time. Key features of Windows Defender include real-time protection, which actively scans files and applications for potential threats as they are accessed. The software also offers cloud-delivered protection, leveraging Microsoft's vast threat intelligence to identify and mitigate risks more effectively. Additionally, Windows Defender includes a built-in firewall that monitors incoming and outgoing network traffic, providing an extra layer of security. The latest version supports various file formats, ensuring compatibility with a wide range of applications and systems. The offline installer serves as a standalone setup option, particularly useful for IT administrators managing air-gapped machines or environments without internet access. Schools and organizations can deploy the full setup via USB drives, allowing for efficient installation on multiple devices without needing to connect to the internet. This method is especially advantageous for enterprise settings, where maintaining security across numerous devices is critical. The standalone installer simplifies deployment processes, ensuring that security measures are in place even in isolated networks. By using the offline installer, organizations can ensure that their systems remain protected against emerging threats, even when updates cannot be downloaded directly. System requirements for Windows Defender include Windows 10 or later, with a minimum of 4 GB RAM and 200 MB of free disk space. Installation steps are straightforward: download the offline installer, run the setup, and follow the on-screen instructions. For silent or network deployment, IT administrators can utilize command-line options to streamline the process, ensuring efficient installation across multiple machines. It is advisable to keep the installer updated periodically to ensure that the latest security definitions are included in the deployment.

Windows Defender Key Features

  • Real-time protection against malware and viruses (version 4.18.2308.7)
  • Cloud-delivered protection leveraging Microsoft threat intelligence
  • Built-in firewall for monitoring network traffic
  • Compatibility with various file formats and applications
  • Scheduled scanning for regular system checks
  • Integration with Windows Security Center for centralized management

Windows Defender — Versions & Official Download Sources

Platform availability and download links for each release.

🪟 Windows .exe / .msi
Version Released 🪟 Windows What Changed
v4.18.2308.7 LATEST May 5, 2026 ↗ page Current stable release

ℹ️ Direct installer links are shown only when verified. Otherwise, links open the official vendor download page where the publisher controls package selection.

Windows Defender System Requirements

Baseline requirements to run the current Windows Defender release:

Operating System
Windows 10 64-bit or later
Memory (RAM)
4 GB RAM minimum
Disk Space
200 MB free disk space
Processor
Intel Core i3 or AMD equivalent

How to Install Windows Defender

Follow these steps to install Windows Defender offline on your PC:

  1. 1

    Download the Windows Defender offline installer from the official source below.

  2. 2

    Follow the on-screen prompts to proceed with the installation. Accept the license agreement when prompted.

  3. 3

    Choose the installation location if prompted, or proceed with the default settings.

  4. 4

    Launch Windows Defender — installation is complete.

Download Windows Defender — All Options

Choose the right installer for your operating system and architecture:

ℹ️ All links go directly to official sources. We never host installer files.

Common Windows Defender Installation Issues & Fixes

Ran into a problem? Here are the most common issues and how to fix them:

⚠️

Windows Defender does not start after installation

If Windows Defender does not launch, check if it is disabled in the Windows Security settings. Go to Settings > Update & Security > Windows Security > Open Windows Security and ensure all features are enabled.

Windows Defender Download FAQ

What types of threats does Windows Defender protect against?
Windows Defender provides protection against various types of threats, including viruses, malware, spyware, and ransomware. Its real-time protection feature actively scans files and applications, ensuring that potential threats are identified and mitigated before they can cause harm.
Can Windows Defender work alongside other antivirus software?
Yes, Windows Defender can coexist with other antivirus solutions, but it is recommended to disable real-time protection in one of the programs to avoid conflicts. Users should ensure that only one antivirus program is actively scanning to maintain system performance and avoid false positives.

Download Details

Software
Windows Defender
Version
v4.18.2308.7
Developer
Microsoft Corporation
License
Freeware
Installer Type
Official download page
File Size
150 MB
Last Updated
2026-05-05
Platforms
Windows
Open Windows download page

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