Press and hold (or right-click) the MP4 file you want to play, select Open with, and then choose your preferred file player from the list of applications.

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.

Hinweis: Wenn Sie sich mit einem Microsoft-Konto wie einem Outlook.com-, Hotmail-, Live- oder MSN-E-Mail-Konto anstelle Ihres Geschäfts-, Schul- oder Unikontos angemeldet haben, melden Sie sich ab, und melden Sie sich dann erneut mit dem richtigen Konto an. Sie sind nicht sicher, mit welchem Konto Sie angemeldet sind? Wählen Sie im Outlook-Navigationsheader Konto-Manager aus.

Choose number of pages to print per sheet: Printing multiple pages on a single sheet of paper is a useful technique to save paper, reduce printing costs, and create compact versions of your documents. The number of pages that can be printed on a single sheet depends on the capabilities of your printer and the printing options you choose (Example: 1, 2, 4, 6, 9 or 16 pages per sheet).

Location history. Some Windows apps and services that use location info also use your location history. When the location setting is on, locations looked up by apps or services will be stored on the device for a limited time (24 hours), then deleted.

注意: 如果知道密码，但只想更改密码，请转到“account.microsoft.com 安全”选项卡，然后选择“更改我的密码”。. 如果知道用户名和密码但已停止工作，请阅读我的用户名和密码已停止工作。

In Settings, select Update & Security , then Windows Update , and then select the Check for updates button. Install any available updates and restart your PC if required.

Published August 2021. This article is intended for users who are not able to upgrade to Windows 11 because their PC is not currently Secure Boot capable.

Tip: If you encounter a problem on your Windows device, pressing the Windows logo key + F takes a screenshot, then opens the Feedback Hub app and automatically uploads the screenshot to the Feedback tab. Follow the on-screen instructions to detail the problem you've encountered.

Similar to having an assistant that helps you manage your incoming paper mail, another person, known as a delegate, can receive and respond to email messages and meeting requests and responses on your behalf.