Download and install or reinstall Microsoft 365 or Office 2021 on a PC ...
Select Install (or depending on your version, Install apps> ). From the home page select Install apps (If you set a different start page, go to aka.ms/office-install .) For Microsoft 365 operated by 21 Vianet go to login.partner.microsoftonline.cn/account. For Microsoft 365 Germany go to portal.office.de/account.
适用于:
Office 2021, Office 2021 for Mac, Office 2019, Office 2019 for Mac, Microsoft 365 家庭版, Office 商业版, Office 365 小型企业版, Microsoft 365 管理员, 由世纪互联运营的 Office 365, 由世纪互联运营的 Office 365 - 管理员版, Microsoft 365 Mac 版, Office 365 Germany – 企业版, Office 365 Germany - 企业管理员版
高级启动选项（包括安全模式） - Microsoft 支持
Windows 7. “高级启动选项”屏幕使你可以在高级疑难解答模式下启动 Windows。. 你可以访问该菜单，方法是打开计算机，然后在 Windows 启动之前按 F8 键。. 某些选项（如安全模式）将以限定状态启动 Windows，其中只会启动空白的基本内容。. 如果在安全模式下启动时 ...
Digital signatures and certificates - Microsoft Support
Signing certificate To create a digital signature, you need a signing certificate, which proves identity. When you send a digitally-signed macro or document, you also send your certificate and public key. Certificates are issued by a certification authority, and like a driver’s license, can be revoked. A certificate is usually valid for a ...
适用于:
Microsoft 365 专属 Excel, Microsoft 365 专属 Word, Microsoft 365 专属 PowerPoint, Microsoft 365 专属 Access, Visio 计划 2, Excel 2021, Word 2021, PowerPoint 2021, Access 2021, Visio Professional 2021, Visio Standard 2021, Excel 2019, Word 2019, PowerPoint 2019, Access 2019, Visio Professional 2019, Visio Standard 2019, Excel 2016, Word 2016, PowerPoint 2016, Access 2016, Visio 专业版 2016, Visio 标准版 2016
创建和格式化硬盘分区 - Microsoft 支持
创建和格式化硬盘分区. Windows 7. 若要在硬盘上创建分区或卷（两个术语通常可以互换使用），必须以管理员身份登录，并且硬盘上必须有未分配的磁盘空间或者在硬盘上的扩展分区内必须有可用空间。. 如果没有任何未分配的磁盘空间，则可以通过收缩现有分区 ...
如何安装最新版本的 DirectX - Microsoft 支持
本文介绍如何获取最新版本的 DirectX 以启用系统上的游戏和多媒体应用程序。 DirectX 9.0c 通过安装 DirectX 9.0c 最终用户运行时适用于 Windows XP 和 Windows Server 2003。 某些应用程序和游戏需要 DirectX 9。 但是，你的计算机包含更新版本的 DirectX。
锁定或解除锁定受保护工作表的特定区域 - Microsoft 支持
如何在 Excel 中锁定单元格以保护数据。 还可以解锁单元格区域并授予他人编辑权限。 清除此复选框 防止用户执行的操作 选定锁定单元格 将指针移向选中了“锁定”复选框（在“设置单元格格式”对话框的“保护”选项卡上）的单元格。默认情况下，允许用户选择锁定的单元格。
适用于:
Microsoft 365 专属 Excel, Excel 2021, Excel 2019, Excel 2016
Choose between the 64-bit or 32-bit version of Office
While 32-bit applications can work with add-ins, they can use up a system's available virtual address space. With 64-bit apps, you have up to 128 TB of virtual address space which the app and any add-ins running the same process can share. With 32-bit apps, you might get as little as 2 GB of virtual address space which in many cases isn't ...
适用于:
Office 2021, Office 2019, Office 2016, Microsoft 365 家庭版, Office 商业版, Office 365 小型企业版, Microsoft 365 管理员, 由世纪互联运营的 Office 365, 由世纪互联运营的 Office 365 - 小型企业管理员版, 由世纪互联运营的 Office 365 - 管理员版, Office 365 Germany – 企业版, Office 365 Germany - 企业管理员版
Product activation for Windows – online & support telephone numbers
Activation helps verify that your copy of Windows is genuine and hasn’t been used on more devices than the Microsoft Software License Terms allow. There are three methods to which you can activate your product: Online via the internet, by telephone using our automated systems, and by a live support advocate. Online: When you begin activation ...
计算两个日期之间的差值 - Microsoft 支持
若要计算两个日期之间的差值，请使用 DATEDIF 函数。. 首先将开始日期放入一个单元格，并将结束日期置于另一个单元格。. 然后键入一个如下所示的公式。. 警告: 如果 Start_date 大于 End_date ，结果将会是 #NUM!
适用于:
Microsoft 365 专属 Excel, Excel 2021, Excel 2019, Excel 2016
Cách đăng nhập vào Hotmail - Hỗ trợ của Microsoft
Để nhận hỗ trợ trong Outlook.com, hãy nhấp vào đây hoặc chọn Trợ giúp trên thanh menu và nhập truy vấn của bạn. Nếu tự trợ giúp không giải quyết được sự cố của bạn, hãy cuộn xuống đến Vẫn cần trợ giúp? và chọn Có. Để liên hệ với chúng tôi trong Outlook.com ...
适用于:
Outlook.com