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

An upgrade differs from an update in that it moves your PC from a previous version of Windows—such as Windows 10—to Windows 11. This FAQ is intended to answer questions about upgrading to Windows 11.

Find out how straight-forward it is to schedule remote meetings in Microsoft Teams for both people inside and outside of your organization.

You can block messages from specific email addresses or domains from reaching your inbox. When you add an email address or domain to your blocked senders list, Outlook automatically moves messages from that sender to the Junk Email folder.

Learn why it's important to have a backup, and how Windows Backup can help you keep your files and settings safe.

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 the Gaming Services Repair Tool to troubleshoot installation and update issues with Gaming Services on PC.

忘れた場合や紛失した場合に Windows パスワードを変更またはリセットする方法について説明します。

How to use the IF function (combined with the AND, OR, and NOT functions) in Excel to make logical comparisons between given values.

Internet Explorer 11 support ended on June 15, 2022. If any site you visit needs Internet Explorer 11, you can open it with Internet Explorer mode in Microsoft Edge.