Windows PC で作業していて、別のデバイスのアプリとコンテンツを PC の画面に表示する場合は、そのデバイスの画面をミラーリングするか、PC に投影します。

Learn how to use virus and threat protection options in Windows Security to scan your device for threats and view the results.

Learn how to add user accounts in Windows 10 and Windows 11. With an account, each person has separate files, browser favorites, and a private desktop.

Learn about Windows service packs and download the latest updates for Windows 10 and Windows 8.1

Experience Microsoft Copilot on windows devices using the Copilot app! The Copilot app helps you get answers and inspiration from across the web, supports creativity and collaboration, and helps you focus on the task at hand.

Windows Photo Viewer isn't part of Windows 10, but if you upgraded from Windows 7 or Windows 8.1, you might still have it. To check, press and hold (or right-click) a photo in File Explorer, and select Open with.If Windows Photo Viewer isn't in the list, you cannot install it on Windows 10.

Learn about the differences between a Microsoft 365 subscription, Office 2016, and the free Office Online apps.

Learn how to unlock your Microsoft account and resolve 'account has been locked' error message.

The new Outlook for Windows brings the latest features, intelligent assisted capabilities and a new modern and simplified design to your Outlook app.

如何将 IF 函数 (与 Excel 中) AND、OR 和 NOT 函数结合使用，以在给定值之间进行逻辑比较。