Contact - Microsoft Support
Support for Windows 10 has ended on October 14, 2025. Learn more about your options for Windows 10.
Where to enter your Office product key | Microsoft Support
If your purchase of Office or Microsoft 365 came with a product key, you enter your product key on one of the websites listed below for your product. After you enter your key, you can download and install Office, or you can renew your Microsoft 365 subscription. Having problems with your product key?
Applies To:
Office 2024, Office 2024 for Mac, Office 2021, Office 2021 for Mac, Office 2019, Office 2016, Microsoft 365 for home
Get more help | XBOX Support
Need help with an XBOX console, an XBOX game, or XBOX network? Find out how to get in touch with us.
Request a refund for digital games | XBOX Support
Find out how to submit a request for a refund for a purchase of digital XBOX content.
Microsoft.com 全球
访问 Microsoft 官方支持网站，获取全球范围内的产品和服务帮助，解决技术问题并提高生产力。
激活 Windows | Microsoft Support
激活是一个技术过程，用于将产品密钥或数字权利与设备的硬件配置配对。 这不评估副本本身的真实性，也不保证 Windows 副本是 正版 的。 它只确保产品密钥或数字权利对硬件配置有效。 另一方面，验证是检查关键 Windows 许可文件是否未被损坏、删除或删除，以及是否必须接收某些更新和下载的 ...
Activate Office for Windows | Microsoft Support
Learn how to activate Office that is pre-installed on new Windows 10 PCs or using a new product key.
Applies To:
Excel for Microsoft 365, Word for Microsoft 365, Outlook for Microsoft 365, PowerPoint for Microsoft 365, Access for Microsoft 365, OneNote for Microsoft 365, Publisher for Microsoft 365, Excel 2024, Word 2024, Outlook 2024, PowerPoint 2024, Access 2024, OneNote 2024, Project Standard 2024, Visio Professional 2024, Visio Standard 2024, Office 2024, Excel 2021, Word 2021, Outlook 2021, PowerPoint 2021, Access 2021, Project Standard 2021, Publisher 2021, Visio Professional 2021, Visio Standard 2021, Office 2021, OneNote 2021, Excel 2019, Word 2019, Outlook 2019, PowerPoint 2019, Access 2019, Project Standard 2019, Publisher 2019, Visio Professional 2019, Visio Standard 2019, Office 2019, Excel 2016, Word 2016, Outlook 2016, PowerPoint 2016, Access 2016, OneNote 2016, Publisher 2016, Office 2016, Microsoft 365 for home
Find your BitLocker recovery key | Microsoft Support
Summary A BitLocker recovery key is needed when BitLocker can’t automatically unlock an encrypted drive in Windows. This is a 48‑digit number that lets you regain access to your drive.
下载并安装或重新安装 Office 2021、Office 2019 或 Office 2016
如果这是你 第一次 安装 Office，则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。 但是如果是重新安装 Office，且已兑换了产品密钥并拥有与 Office 关联的帐户，请转到登录 以下载 Office 的部分。
Applies To:
Office 2021, Office 2021 for Mac, Office 2019, Office 2016, Office 2016 for Mac
在 Windows 中个性化你的颜色 | Microsoft Support
摘要 更改设备上的颜色模式和主题色可以通过提供更个性化且更具视觉吸引力的界面来显著增强用户体验。 无论你喜欢浅色还是深色主题，或者想要向用户界面添加一些颜色，调整这些设置都很简单，只需几个步骤即可完成。 颜色模式 Windows 支持两种主要颜色模式：浅色和深色。 浅色模式提供 ...