根据获取Windows 10或Windows 11副本的方式，需要 25 个字符的产品密钥或数字许可证才能激活它。 Windows 10版本 1511) 中称为数字权利的数字许可证 (是Windows 10和Windows 11中无需输入产品密钥的激活方法。 如果二者都不具备，则无法激活你的设备。

注意: 如果你有多个一次性购买的 Office，并且安装 Office 后在激活时遇到问题，请参阅更改 Office 产品密钥。 如果你遵循软件许可条款中的转移条款，你可以将 Office 移动到另一台计算机，但是必须通过电话将其激活，然后从原来的计算机上卸载 Office。

适用于多个 Office 版本的最佳实践. 如果购买了 Office 的多个副本，并使用相同的安装按钮来在多台电脑上安装 Office，在其它电脑上的激活将会失败。 发生这种情况是因为每个“安装”按钮只能与唯一的产品密钥关联，该产品密钥只能安装在一台电脑上。 要解决 ...

Find out how to install Windows 11 on your device, whether you need to use Windows Update, Cloud download, or Local reinstall. Get tips and troubleshooting help from Microsoft Support.

Next to the password you want to change, select More actions , and then select Edit.

Many tasks for Office products don't require a product key because your Microsoft account takes care of them instead.

You can manage all of your Microsoft subscriptions in your Microsoft account dashboard. Select each subscription to change when and how you pay, or to see order history & receipts.

Learn different ways to locate your BitLocker recovery key in Windows, and learn about how BitLocker might have been activated on your system.

Note: If you see the icon next to the On/Off toggle for an app, you can select it to see the registry location that contains the path for the app. Apps installed through Microsoft Store (.MSIX apps) don’t have these icons. If you select the icon for these apps, File Explorer opens and highlights the executable file.

Before you begin. Driver updates for Windows, along with many devices, such as network adapters, monitors, printers, and video cards, are automatically downloaded and installed through Windows Update.