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。按“开始”按钮 ，然后在“搜索”框中输入“商店”。 从结果中选择 Microsoft Store 以打开应用。选择屏幕右上角的帐户，然后选择 兑换充值码或礼品卡。输入由 25 个字符组成的代码，选择 下一步，然后按照提示操作。

From the Overview page, select Office apps and on that page, find the Microsoft 365 product you want to install and select Install. To install Microsoft 365 in a different language, or to install the 64-bit version, use the dropdown to find more options. Choose the language and bit version you want, and then select Install.

有关如何激活 Windows 7 或 Windows 8.1 的详细信息，包括如何通过手机激活，请参阅 激活 Windows 7 或 Windows 8.1 。 了解如何排查 Windows 激活错误。

How to redeem a Windows activation code. On your Windows PC, go to the Activation section of the Settings app and select Change product key. Open Settings. Problems redeeming a code? If you're unable to redeem a code, check our self-help troubleshooting guidance below. Get help. Need more help?

如果无效，表明你的电脑运行的是非正版 Windows。 如何激活我的正版Windows软件？ 若要了解如何激活Windows 10或Windows 11，请参阅 激活Windows。

Subscriptions & billing. Request a refund for digital games. Notifications. Info. Questions about a refund email? We’re investigating this issue now. In the meantime, sign in to your account to see your latest refund request status. We understand that sometimes purchases of digital game products don’t go as planned.

In Windows 11, you decide when and how to get the latest updates to keep your device running smoothly and securely. To manage your options and see available updates, select Check for Windows updates. Or select Start > Settings > Windows Update . Here's some other info you might be looking for:

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

Contact Microsoft Support. Find solutions to common problems, or get help from a support agent.

Uninstall from the Start menu. Select Start > All apps and search for the app in the list shown. Press and hold (or right-click) on the app, then select Uninstall. Uninstall in Settings. Select Start > Settings > Apps > Apps & features . Find the app you want to remove, select More > Uninstall.