Microsoft Defender is a new security app that helps protect you and your family across all your devices; Windows, Android, Mac, and iOS.

Learn how to recover files that have been lost, deleted, or accidentally changed.

Download the latest Windows update from the Windows Update page in Settings for your device when it becomes available.

Find out how to boot into safe mode in Windows from Settings, the sign-in screen, and a black or blank screen.

Learn how to use and install mobile apps on your Windows 11 PC with the Windows Subsystem for Android™.

Fresh Start in Windows 10 lets you perform a clean reinstallation and update of Windows while keeping your personal data and most Windows settings intact.

If you are having trouble with your microphone features, the following information can help you troubleshoot and resolve issues.

This troubleshooter assists customers whose machines are not yet updated to the latest release, Windows 10 Version 1607. This update will initially be released only to a small set of targeted customers. This set will expand over time. Windows users can start the assistant from this article.

The Program Install and Uninstall troubleshooter helps you automatically repair issues when you're blocked from installing or removing programs.

起動時に自動的に実行するアプリを追加する方法について説明します。