If you can’t find the BitLocker recovery key and are unable to undo any changes that caused it to be needed, you’ll have to reset your device using one of the Windows recovery options.

了解如何在移动设备、Windows 设备或 Xbox 主机上兑换 Microsoft/Xbox 礼品卡或其他代码。

注意: 你的 Hotmail 或 Outlook.com 密码与你的 Microsoft 帐户密码相同。 如果可以登录，但 Outlook.com 出现问题，请检查 服务状态。 如果状态不是绿色，请等到服务正常运行再重试。 Microsoft 始终保持留意异常的登录活动，以防其他人试图登录到你的帐户。 如果您在去新地方的旅途中或使用新的设备，我们 ...

If you use Microsoft Edge as your web browser, you can set up multiple Microsoft Edge profiles, one for each Microsoft account. This way, you can log into different accounts at the same time.

Learn how to recover a hacked or compromised account, what to do next, and how to prevent your account from being compromised in the future.

Learn how to update your security processor or TPM firmware to protect Windows 10 and your device from attacks by malicious software.

Learn how to reset or change your Microsoft account password. Get help with a forgotten Microsoft account password.

Go to Settings and more > Settings > Profiles > Passwords . Next to the password you want to change, select More actions , and then select Edit. When prompted, authenticate yourself to the operating system to get access to the password information. After you successfully authenticate yourself, in the Edit password dialog, update your password, and then select Done.

Learn how to download files from the web, change your default download location, and find files you've downloaded on your PC using Internet Explorer.

如果这是 你第一次 安装 Office 可能需要先执行一些设置步骤。 展开下面的 “了解详细信息”部分。 但是，如果要重新安装 Office ，并且已兑换产品密钥，并且拥有与 Office 关联的帐户，请转到 登录部分以下载 Office。