COUNTIF 是 一个统计函数，用于统计满足某个条件的单元格的数量；例如，统计特定城市在客户列表中出现的次数 ... 当包含该函数的公式引用已关闭工作簿中的单元格或区域并计算这些单元格的值时，会出现此错误。

Important: Before trying any of the solutions below, make sure you back up your personal files. You can back up your Windows PC, or insert a USB drive and use File Explorer to drag and copy important files to the USB drive.If you’re signing into Windows with a Microsoft account, your system settings will be automatically restored after updating, once you’re connected to the internet.

To pin Quick Assist to your taskbar so you can quickly get back to it, after Quick Assist is open, right-click (or press and hold) the icon on your taskbar > Pin to taskbar. If the old app icon still appears on your device, make sure you select the new app icon.

Advanced settings - This will open the classic Windows Defender Firewall tool which lets you create inbound or outbound rules, connection security rules, and see monitoring logs for the firewall. Most people won't want to dig into it that deeply; adding, changing, or deleting rules incorrectly can cause your system to be more vulnerable or can cause some apps not to work.

无论是将第一个 QQ 邮件帐户还是其他 QQ 邮件帐户添加到 Outlook，这些步骤都是相同的。 首先，你需要在浏览器中的 QQ 邮件帐户中执行一些步骤。 打开 QQ 邮箱，然后选择 “设置 >帐户”。

Follow these steps to automatically diagnose and repair Windows security problems by turning on UAC, DEP protection, Windows Firewall, and other Windows security options and features.

要返回“主页”屏幕，请按控制器上的 Xbox 按钮 打开导航页，然后选择“主页”。 选择“我的游戏和应用”，再选择“应用”或“游戏”，然后转到“准备安装”选项卡。 选择“队列”，并突出显示处于活动状态的下载或安装。处于活动状态的下载将显示在游戏或应用磁贴底部，同时还将显示一个 ...

To open File Explorer, select Windows logo key + E or go to Start and type File Explorer in the search box. Select File Explorer in the results.. Top topics. Here are answers to a few common questions about File Explorer: How can I open File Explorer and find the Windows 11 features?

Hinweis: Die Schritte zum Installieren der Versionen 2019, 2016 oder 2013 von Office Professional Plus, Office Standardoder einer eigenständigen App wie Word oder Project können unterschiedlich sein, wenn Sie Microsoft 365 über einen der folgenden Wege erhalten haben: Microsoft Workplace Discount Program (früher als Home Use Program bezeichnet): Wenn Sie Microsoft 365für die persönliche ...

Learn how to check your PC's storage capacity and manage it effectively with Microsoft Support's guidance.