How to download and install Microsoft defender antivirus

Windows 內建防毒 Microsoft Defender 夠用嗎？ 專家完整解析 Defender 功能、保護力、與付費防毒比較，並提供 Win10/11 安全強化設定教學 (含勒索軟體防護)。

Microsoft Defender delivers complete security protection while remaining totally free from charges that are common in other free antivirus solutions without premium upgrades.

安裝 Microsoft Defender，保護您的Android、iPhone、Mac和 Windows 裝置免於受到威脅。 在您的裝置上下載 Microsoft Defender，方法如下：

Windows 版的 Defender 可讓您檢視手機和電腦的保護狀態，並接收即時的保護警示。 防毒程式和防網路釣魚功能由 Windows 安全性提供。

This post offers a guide for Windows Defender download, install, uninstall, and reinstall on Windows 10/11. Some tips to help you fix Windows Defender not working or can’t open problem are also provided.

Download Microsoft Windows Defender - Free program that protects your computer against pop-ups, slow performance and security threats.

Search for Microsoft Defender in the search bar present on its homepage. In doing so, you’ll be linked to the Microsoft Defender download page. Once it has been installed, you can open it...