The Microsoft Authenticator app helps you sign into your accounts when you're using two-step verification.

Microsoft サポートは、Microsoft 製品に関するサポートを提供します。 Microsoft Copilot、Microsoft 365、Windows 11、Surface などのハウツー記事、ビデオ、トレーニングを検索します。

Whenever you access, change personal info in, or add new contact info to your Microsoft account, we generate a security code and send it to either an email address or a device number in your account security info. You're then prompted to enter that code to confirm the change. Generally, it only takes a few moments to receive the code.

Find out what to do if you receive a sign-in error when your age is verified.

If you can't sign into your Microsoft account, most issues can be identified by our sign-in helper tool. The tool will ask you to enter the email address or mobile phone number you're trying to sign in with and check the details you provide. If we detect a problem with your account, we'll tell you what you need to do to solve the problem. If we don't detect any problem, we'll guide you through ...

需要 Xbox 主機、Xbox 遊戲或 Xbox 網路的協助嗎? 了解如何與我們連絡。

Learn how to manage your Microsoft devices. Add, remove, register, or rename a device on your Microsoft account.

Learn how to secure your family’s Xbox profiles.

Windows 產品金鑰是用來啟用 Windows 的 25 個字元代碼。 看起來像這樣： 產品金鑰：XXXXX-XXXXX-XXXXX-XXXXX-XXXXX 找到你的 Windows 10 或 Windows 11 產品金鑰 根據你取得 Windows 10 或 Windows 11 的方式，你需要 25 字元的產品金鑰或數位授權來啟用。 數位授權是一種在 Windows 10 和 Windows 11 中啟用的方法，不需要輸入 ...

If you think your Microsoft account has been hacked, find out how to secure your account and check for unauthorized activity.