在电脑上. 在“设置”中检查网络状态。打开设置 >网络和 Internet。 检查屏幕顶部的以太网连接状态。 请确保网络连接名称下面显示“已连接”。如果存在错误，例如显示“需要操作”的错误，请选择“以太网”以查看以太网连接设置。 如果一根以太网电缆不起作用，并且附近有其他以太网电缆 ...

Note: The steps to install the 2019, 2016, or 2013 versions of Office Professional Plus, Office Standard, or a stand-alone app such as Word or Project might be different if you got Microsoft 365 through one of the following: Microsoft Workplace Discount Program (formerly known as Home Use Program): If you bought Microsoft 365 for personal use through your company, see Install Office through ...

Note: Some versions of Project don't have an associated Microsoft account, or work or school account, or you need to redeem your product key in a different way.See the following if this is how you got your version of Project Professional 2021, Project Professional 2019, Project Standard 2021, or Project Standard 2019: Microsoft Workplace Discount Program (formerly known as Home Use Program ...

Windows 8.1 reached the end of support (EOS) on January 10, 2023, at which point technical assistance and software updates are no longer provided. If you have devices running Windows 8.1, we recommend upgrading them to a more current, in-service, and supported Windows release. If devices do not meet the technical requirements to run a more current release of Windows, we recommend that you ...

The Access 365 Runtime is like previous runtimes in that all design-related UI is either removed or disabled. The Access 365 Runtime includes the Access Database Engine which contains a set of components that facilitate the transfer of data between existing Microsoft Office files such as Microsoft Office Access (*.mdb and *.accdb) files and Microsoft Office Excel (*.xls, *.xlsx, and *.xlsb ...

有时仅有效的安全工具并不那么有效。 你希望Microsoft Defender 始终watch你的背部，保护你免受你未预料到的恶意网站的影响。 为此，Defender 需要具有在后台运行的权限。 辅助功能服务. 为了确保要访问的网站未知为危险，Defender 需要能够看到该地址。

Press Ctrl + Alt + Delete to open Task Manager.If you don’t see Task Manager after pressing Ctrl + Alt + Delete, press Ctrl + Shift + Esc to open Task Manager.. If Task Manager flickers along with everything else on the screen, a display driver is probably causing the problem.

如果你使用的是 Microsoft Outlook 应用或 Outlook.com，并且你和你的收件人都在 Microsoft Exchange 或 Microsoft 365 上，并且在同一组织中，则可以撤回或替换你发送的电子邮件。 如果你使用的是新的 Outlook，请在此处了解如何召回邮件。

获取 Windows 操作系统的官方支持和帮助信息，以及如何使用 Windows 的指南。

Office 2021、Office 2019 或可一次性购买的 Office 2016 版本： 以下产品包括 Office 应用程序的完全安装版。 Office 家庭和学生版 Office 小型企业版 Office 专业版. 可一次性购买的独立 Office 2021、Office 2019 或 Office 2016 应用 Word Excel PowerPoint OneNote* Outlook Access