注意: 某些相机将不会显示在“相机设置”页中。其中包括用于 Windows Hello 人脸身份验证的红外线 (IR) 摄像头、使用 DirectShow 技术（如 DSLR 或运动相机制造商提供的便于将其设备用作网络摄像头的许多应用）的相机，以及不由 Windows 管理的专有相机，例如工业相机和许多网络摄像头。

安装 Windows 11. 在针对你的特定电脑测试和验证 Windows 11 升级后，Windows 更新将指示它已准备好安装。 若要检查 Windows 11 是否已为你的设备准备就绪，请转到“开始” “设置” >“更新和安全性” >“Windows 更新” ，然后选择“检查更新”。 如果升级适用于你的设备，并且想要继续，请下载并安装它。

在 Excel 单元格中插入静态日期或时间. 工作表中的静态值是重新计算或打开工作表时不会改变的值。 当按下如 Ctrl+; 的组合键以将当前日期插入单元格时，Excel 获取当前日期的“快照”，然后将日期插入单元格中。

2. Fill out the form using a recognized device and location. If possible, complete the form using a device you previously used to sign into your account and at a location where you commonly use that device and that we'll recognize, such as your home or office.

Features with audio and video functionality.. Many features that come as part of Windows can be used to view or play video or audio content. Here are some examples: OneNote app (lets people record or play audio), Microsoft Edge web browser (lets people play audio and video content on the internet), the Photos app, the OneDrive app, and others.

To count numbers or dates that meet a single condition (such as equal to, greater than, less than, greater than or equal to, or less than or equal to), use the COUNTIF function. To count numbers or dates that fall within a range (such as greater than 9000 and at the same time less than 22500), you can use the COUNTIFS function. Alternately, you can use SUMPRODUCT too.

Better together tip: Manage drafts from Outlook for iOS and Outlook for Android. If you use Outlook for iOS or Outlook for Android, your drafts will automatically synchronize to your mobile device.From there, you can finish messages you've started at your computer, easily add attachments from your photos or camera, or use Office Lens to capture notes from a whiteboard in a meeting.

Argument. Description. start_date . Required. A date that represents the first, or starting date of a given period. Dates may be entered as text strings within quotation marks (for example, "2001/1/30"), as serial numbers (for example, 36921, which represents January 30, 2001, if you're using the 1900 date system), or as the results of other formulas or functions (for example, DATEVALUE("2001 ...

Microsoft account help and support. Get help with signing in, locked or compromised accounts, linked accounts, closing, reopening, and updating your security info and account profile.

Compress the file. When you compress, or zip, your file, it decreases its size, and it might decrease it enough to fit within the Outlook size limits for attachments.The following articles describe how to compress and extract files for different Windows operating systems.