Find help and how-to articles for Windows operating systems. Get support for Windows and learn about installation, updates, privacy, security and more.

Get started with Microsoft Teams (free). Explore your options, find out what’s new, browse help topics, and more.

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。

Learn how to download, install, and configure Language Accessory Packs for Microsoft 365 for additional display, help, and proofing tools.

Rename your device to make it easier to identify if if you use multiple computers with your Microsoft account.

Updates to the default screen and sleep settings now help you use energy more efficiently and extend battery life. You can find efficiency settings in Windows 11 at Settings > System > Power & battery.. For a guided walkthrough of how each of the power and battery settings can improve your device's performance, click the button to open the Get Help app:

You can repair some apps and programs if they're not running correctly. Note that you won't see repair, change, or modify options for all apps and programs.

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

Microsoft 365 または Office を初めて設定する場合、およびバージョンや製品の入手方法によっては、最初に完了する必要がある手順があるか、この記事に記載されている手順とは全く異なる手順に従う必要がある場合があります。

Learn how to use a health report in Windows Security to manage your device performance and keep your device secure.