For a black screen, use the following keyboard shortcut: Windows logo key + Ctrl + Shift + B to reset your graphics driver.

查找有关 Windows 操作系统的帮助和操作方法文章。 获取对 Windows 的支持，并了解安装、更新、隐私、安全等方面的信息。

Make the everyday easier with Windows 11. When there's a lot to do, Windows 11 helps you get it done. With intuitive navigation and new multitasking tools, it brings you the performance you want and the security you need.

Scan the page and save it on your computer in a common file format: .bmp, .jpg, or .png. For information on how to use your scanner, use the manufacturer’s manual or Web site.

Note: Some devices might have more than one presence sensor.If so, you can choose which one you want to use. May 2023 update for Windows 11 22H2 and later: Wake on approach can be enabled on systems that support S3 sleep state, such as desktops.For USB-connected presence sensors to work properly on these systems, you'll need to enable USB Wake Support (or a similarly named option) in BIOS ...

Each widget is powered by a different app or service. To see what is powering a widget, select More Options (…) in the upper-right corner of the widget, and look for the “Powered by” message at the bottom of the menu. Each individual widget is an extension of its corresponding app or service and is controlled by the settings for that app or service.

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.

Updates to the default screen and sleep settings now help you use energy more efficiently and extend battery life. You can find efficiency settings in Windows 11 at Settings > System > Power & battery .. For a guided walkthrough of how each of the power and battery settings can improve your device's performance, click the button to open the Get Help app:

Windows 10, version 2004 and Windows Server, version 2004 update history; End of service statement; December 14, 2021—KB5008212 (OS Builds 19041.1415, 19042.1415, 19043.1415, and 19044.1415)

Select Start upgrade.The upgrade might take a while and you won't be able to use your device until it's done.