Important: Microsoft accounts, the Windows operating system, and other Microsoft products include passwords to help secure your information.This article provides some options that you can use to reset or recover your password if you forget it. Be aware that, if these options don’t work, Microsoft support can't help you retrieve or circumvent a lost or forgotten password.

Get help and training for Office products, such as Word, Excel, PowerPoint, and Outlook. Learn tips and tricks, troubleshoot issues, and access online resources.

注: パスワードがわかっていても変更したい場合は、[セキュリティ] タブ account.microsoft.com 移動し、[パスワードの変更] を選択します。 . ユーザー名とパスワードがわかっていても動作が停止している場合は、「ユーザー名とパスワードが機能しなくなった」を参照してください。

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A family group is a set of individuals connected through the Microsoft Family Safety app on their Windows, Xbox, or mobile devices. Establishing a family group is an easy, effective way to encourage healthy online habits and manage busy schedules.

个人设备的所有者或管理员激活了 BitLocker (在某些设备上也称为设备加密，) 通过“设置”应用或控制面板： 在这种情况下，激活 BitLocker 的用户选择了保存密钥的位置，或者在设备加密的情况下选择 (，) 自动将密钥保存到其 Microsoft 帐户。

When you initially setup your Windows device, you might have opted to use a local account instead of a Microsoft account. The main difference between a local account and a Microsoft account is that a local account is specific to one device, while a Microsoft account can be used across multiple devices and Microsoft services.

Office または Microsoft 365 を購入したときにプロダクト キーが付属していた場合は、使用している製品に対応する以下の Web サイトのいずれかにプロダクト キーを入力します。

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Type about in the search box on your taskbar, and then select About your PC.. View your PC info