For more information, please visit Update Microsoft 365 or Office on your macOS or iOS device. Support for Office 2021 will end on October 13, 2026. Learn more about your options for Office. Support for Windows 10 has ended on October 14, 2025. Learn more about your options for Windows 10.

Learn how to activate Windows using a product key or digital license, check your activation status, and link your Microsoft account.

XBOX Support offers help for XBOX, Game Pass, and billing questions. Get advice and customer service in the XBOX Support community.

Find solutions for Xbox account and profile issues, manage settings, and get support for your Xbox experience.

打开“设备管理器” 选择“ 开始 ”，输入 “设备管理器 ”。 然后，从搜索结果中选择 “设备管理器 ”。

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?

安装媒体（如 U 盘）可用于安装 Windows 的新副本、执行 Windows 的全新安装或重新安装 Windows。 若要创建安装媒体，请转到 软件下载网站，可在其中找到分步说明。 在该网站上，可以选择 Windows 版本并在 USB 闪存上创建安装媒体。 或者，可以创建一个 ISO 文件，用于虚拟机 (VM) ，或用于将安装媒体 ...

Learn how to sign in and create app passwords for Microsoft apps and devices that don't support two-step verification.

Learn how to download, install, and configure additional language packs for your version of Windows.

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 ...