Learn how to sign in and create app passwords for Microsoft apps and devices that don't support two-step verification.

Learn how to activate Windows using a product key or digital license, check your activation status, and link your Microsoft account.

Outlook.com、Hotmail、Live、または MSN のメール アカウントにサインインできない場合、サインインまたはサインアウトする方法がわからない場合は、次の解決方法を試してみてください。

Add voting buttons to a message so that recipients can vote; results are tracked automatically in Outlook.

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.

Check the Xbox services, games, and apps for any service outages.

このページでは、IME 機能やキーボードのショートカットなど、Microsoft 日本語 IME の使い方について説明します。

Create a recovery drive so you can reinstall Windows 10 or Windows 11 in case you experience a major issue such as hardware failure.

Open Device Manager. By pressing submit, your feedback will be used to improve Microsoft products and services.

Describes how to use the System File Checker tool to troubleshoot missing or corrupted system files in Windows 8.1, Windows 8, Windows 7 or Windows Vista.