了解如何创建用于安装或重新安装 Windows 7、Windows 8.1 或 Windows 10 的安装介质。

Learn how to remove malware from your PC. Use Microsoft Defender Antivirus in Windows 10 or Windows 11 to scan your PC for malware, viruses, or other threats.

了解如何使用 Windows 安全中心中的病毒和威胁防护选项扫描设备中的威胁并查看结果。 运行所需的扫描 即使 Windows 安全中心处于打开状态并自动扫描你的设备，你仍然可以在需要时执行其他扫描。

了解 Windows 中的恢复选项。 查明如何重置电脑、回退到以前版本的 Windows 或使用介质重新安装 Windows。 注意: 删除所有内容 > 更改设置 提供了两个选项。 打开数据擦除会删除文件并清理驱动器。如果你打算捐赠、回收或出售你的电脑，请使用此选项。

Find Windows 11 specs, features, and computer requirements. Make sure the device you want to install Windows 11 on meets the minimum system requirements. If your device is currently running Windows 10, we recommend you verify the minimum system requirements using the PC Health Check app.

Microsoft 365 商业版 如果 企业 订阅计划包含桌面版 Microsoft 365 应用，则除非组织中有人向你分配了许可证，否则你不会看到安装它的选项。 了解如何在我拥有哪些 Microsoft 365 商业版产品或许可证？ 中检查此项；如果你是负责向组织中人员分配许可证的 Microsoft 365 管理员，请参阅向用户分配许可证。

If Microsoft 365 or Office is installed, but you need help with basics, or want to learn how to do a specific task such as print a document, set up an account in Outlook, or use VLOOKUP in Excel, go to the top of this page (if viewing in a web browser) and select Products.

Microsoft 365 for the web makes it easier for you to work in the cloud because Word, Excel, PowerPoint, OneNote, and PDF documents open in your web browser. Sign in to your organization’s Microsoft 365 site to get started. You can access your documents whenever you have an Internet connection, from almost any device.

You may have heard that Office is getting a new name and a fresh look! We know that you might have questions, so we'll guide you through all the details.

The following steps describe how to uninstall Microsoft 365 products on a PC (laptop, desktop, or 2-in-1). For Mac, see Uninstall Office for Mac. Tip: Uninstalling Microsoft 365 only removes the Microsoft 365 applications from your computer, it doesn't remove any files, documents, or workbooks you created using the apps.