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。.

了解如何安装 Windows 11，包括在“设置”中访问 Windows 更新页的建议选项。.

A Windows product key is a 25-character code used to activate Windows. It looks like this: PRODUCT KEY: XXXXX-XXXXX-XXXXX-XXXXX-XXXXX. Locate your product key for Windows 10 or Windows 11. Depending on how you got your copy of Windows 10 or Windows 11, you'll need either a 25-character product key or a digital license to activate it.

本文介绍如何在 Windows 8.1、Windows 8、Windows 7 或 Windows Vista 中使用系统文件检查器工具来解决丢失或损坏的系统文件的问题。.

Windows 激活方法. 取决于你获取 Windows 11 副本的方式，你需要数字许可证或由 25 个字符组成的产品密钥才能激活该副本。 如果二者都不具备，则无法激活你的设备。 数字许可证（在 Windows 11 版本中称为数字授权）是 Windows 11 的一种激活方法，该方法不需要输入产品密钥。 产品密钥是由 25 个字符组成的代码，用于激活 Windows。 产品密钥将显示为：XXXXX-XXXXX-XXXXX-XXXXX-XXXXX. 确定使用哪种激活方法后，请按照相应的使用 数字许可证激活 或使用 产品密钥激活 中的步骤操作。 我使用哪种 Windows 激活方法、数字许可证或产品密钥？ 购买 Windows 11 许可证. 使用数字许可证激活 Windows.

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A product key is a 25-character code used to activate Windows. What you'll see is PRODUCT KEY: XXXXX-XXXXX-XXXXX-XXXXX-XXXXX. After determining which activation method you use, follow the steps in the corresponding Activate using a digital license or Activate using a product key .

Microsoft Authenticator helps you sign in to your accounts if you've forgotten your password, use two-step verification or multi-factor authentication, or have gone passwordless on your account. Note: Before you can use Authenticator as a way to sign in, you need to download the app and have already added Authenticator to your accounts.

This article applies if you’ve recently made changes to your device hardware and are trying to upgrade to Windows 11. Hardware changes might affect your upgrade eligibility, though you’ll need to take a few steps to see your updated eligibility in Settings.