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

重新激活 Office 需要不同的步骤，具体取决于你的情况。 安装或重新安装. 注意: 如果你已拥有 Microsoft 365 或 Office 许可证，则可以登录到 Microsoft帐户“服务 & 订阅”页，并安装你拥有的产品 () 。 尝试安装引导演练： 尝试引导支持. 或者，如果要在现有或新的计算机上安装或重新安装 Microsoft 365 或 Office，请转到： 对于 Microsoft 365 和 Office 2021 - 在电脑或 Mac 上下载并安装Microsoft 365 或 Office 2021。 对于 Office 2019、2016 或 2013 - 下载并安装或重新安装 Office 2019、Office 2016 或 Office 2013。

Activate an Office purchase or offer that's included on a new Windows device. Activate Office from Microsoft Workplace Discount Program. Activate a brand new Office product key. Troubleshoot activation errors. Activate Microsoft 365 or a non-subscription version of Office.

Install Microsoft 365 2019 or 2016 on a PC. Remember a one-time purchase version of Microsoft 365 is licensed for one install only. Depending on your browser, select Open file (in Edge or Internet Explorer), Setup (in Chrome), or Save File (in Firefox).

Hotmail 现在为 Outlook.com. 若要登录到 Hotmail，需要提供 Microsoft 帐户用户名和密码。. 登录. 提示: 登录时，如果你希望下次直接进入你的邮箱，请在“保持登录?”提示中选择“ 是 ”（对于共享计算机，不建议这样做）。. 或者，选中“不再显示此内容”框，然后 ...

When you’re away from your console or your Windows 10/11 device, you can still get ready to play your next Xbox console game. Use the Xbox app on mobile the Xbox Game Pass app, or the Microsoft Store on PC to remotely install games—so your games are ready when you are.

Windows 11. PC Health Check app brings you up to date info on your Windows device health, helping you take action to improve your device performance and troubleshoot performance problems. It is periodically updated based on customer feedback to help you make the most of your Windows PC. How to open PC Health Check.

Depending on your product and if it's still in support, Microsoft support experts are available to help you with a broad selection of support options and able to address product and service challenges for a more personalized experience.

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.

If you recently made any changes to your hardware and want to see if your computer now meets the requirements for Windows 11, the easiest way to do that is with the PC Health Check app: If you haven't yet, install the PC Health Check app here.