Select Start > Settings > Personalization.The preview window gives you a sneak peek of your changes as you make them. In Personalize your background, you can select a picture, a solid color, or a slideshow of pictures you create.Or you can choose Windows spotlight to see a new image from around the world every day.

Windows Hello 是登录到 Windows 设备的一种更个性化、更安全的方式。 在 Windows Hello 中，你可以使用面部识别、指纹或 PIN 登录，而不是使用密码。

Right-click the app, select More, and then select Open file location.This opens the location where the shortcut to the app is saved. If there isn't an option for Open file location, it means the app can't run at startup.

Microsoft's products and services work best if you use the same language and region across all your devices, and in all of your app and Store settings.

如果你没有台式电脑并且滑块未显示或不起作用，请尝试更新显示驱动程序。 在任务栏上选择"搜索"，键入"设备管理器"，然后从结果列表中选择"设备管理器"。在"设备管理器"中，选择"显示适配器"，然后选择显示适配器。长按 (或右键) 显示适配器名称，然后选择"更新驱动程序"并按照说明操作。

Note: If you have a message open in its own window instead of the Reading pane, the Backspace key will not archive the message. You have to close the message and view it in the Reading pane for the Backspace keyto archive the message. When the message is open in a new window, the only way to archive the message is by using the Archive button on the ribbon.

Learn how to remove malware from your PC. Use Microsoft Defender Antivirus in Windows 10 or Windows 11 to scan your PC for malware, viruses, or other threats.

Note: Some cameras won't appear in the Camera settings page.These include infrared (IR) cameras used for Windows Hello Face authentication, cameras using DirectShow technology (like many apps provided by DSLR or action camera manufacturers so their devices can be used as webcams), and proprietary cameras that aren't managed by Windows—such as industrial cameras and many networked cameras.

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。

如果列因为不够宽而无法显示单元格的所有内容，Microsoft Excel 可能在单元格中显示“#####”。 将日期和时间返回为负值的公式也可能显示为“#####”。 有多种方法可对此进行故障排除，例如双击列标题的右边缘，或将其拖动到所需的宽度。 请注意，由于单元格具有负日期或时间值，Excel 可能还会 ...