Generally, if you bought a physical copy of Windows, the product key should be on a label or card inside the box that Windows came in. If Windows came preinstalled on your PC, the product key should appear on a sticker on your device. If you’ve lost or can’t find the product key, contact the manufacturer. To ensure your product key is ...

How to open PC Health Check. In Windows, use Search on the taskbar to search for “PC Health Check,” then select it from the list of results. If a PC Health Check update is available, you can quickly install it for the latest version. If you don't have PC Health Check installed, you can install it by going to https://aka.ms ...

Spoof Intelligence from Microsoft 365 Advanced Threat Protection and Exchange Online Protection help prevent phishing messages from reaching your Outlook inbox. Outlook verifies that the sender is who they say they are and marks malicious messages as junk email. If the message is suspicious but isn't deemed malicious, the sender will be marked ...

Contact Microsoft Support. Find solutions to common problems, or get help from a support agent.

To see self-help answers, or to get support via email, Select Help from the top menu then Help. Open the Help pane. Enter your question or issue in the Search Help box on the right, and then press Return. If the self-help answers don't resolve your issue, try a different search, or scroll to the bottom of the Help pane and, under Still need ...

The SharePoint landing page serves as a comprehensive resource for end users exploring functionalities of SharePoint. It offers guidance on getting started with SharePoint, including how to sign in, create SharePoint sites, and set up pages to organize content effectively. Users can access tutorials on managing documents and libraries within SharePoint, as well as leveraging data and lists for ...

若要计算满足单个条件 (（例如等于、大于、小于、大于或等于或小于或等于) ）的数字或日期，请使用 COUNTIF 函数。. 若要计算 (范围内的数字或日期（例如大于 9000 且同时小于 22500) ），可以使用 COUNTIFS 函数。. 或者，也可以使用 SUMPRODUCT。.

若要添加选项按钮，请选择“ 开发工具 ”选项卡，选择“ 插入 ”，然后在“ 窗体控件 ”下选择“ ”。. 单击要在其中添加复选框或选项按钮控件的单元格。. 提示: 一次只能添加一个复选框或选项按钮。. 若要加快速度，请在添加第一个控件后右键单击它 ...

鍵盤快速鍵是按鍵或按鍵組合，可讓您用於替代一般使用滑鼠執行的動作。. 以下是 Mac 版 新的 Microsoft Edge 和 Microsoft Edge 清單。. Windows Mac. 按這個按鍵. 若要執行此動作. Ctrl + Shift + B. 顯示或隱藏我的最愛列. Alt + Shift + B. 將焦點設在我的最愛列中的第一項目.

IF 函数 - 嵌套公式和避免错误. Microsoft 365 专属 Excel Microsoft 365 Mac 版专属 Excel Excel 网页版 更多... IF 函数允许通过测试某个条件并返回 True 或 False 的结果，从而对某个值和预期值进行逻辑比较。. 因此 IF 语句可能有两个结果。. 第一个结果是比较结果为 True，第二 ...