若要在 Outlook.com 中获取支持，请单击此处或选择菜单栏上的帮助，然后输入查询。 如果自助服务无法解决问题，请向下滚动到“仍需要帮助？”，然后选择“是”。 若要在 Outlook.com 中联系我们，需要登录。

When you back up your files, apps, and settings in the cloud using your Microsoft account, you get 5 GB of free cloud storage and other benefits that protect your files with the latest security and make everyday tasks easier.

You'll see the logo screen on your screen. Continue to hold the Volume Up button. Release the button when the UEFI screen appears. If you have a Windows Pro/Enterprise device (not a Windows Home device), you can then toggle off Type Cover port from the Devices menu and exit UEFI. Re-enter UEFI (press power + Volume Up) and toggle Type Cover port back on, then check if the Keyboard works in UEFI.

Learn how to tell if your Office software is genuine. To help determine if your Microsoft software is genuine, go to our How to Tell site for more information. Here you'll learn about authentic packaging, including what to look for with product key labels, and Certificate of Authenticity (COA), how to report counterfeit software, and find out what your shopping and licensing options are.

Under Personalization & advertising, turn on or off the setting for Allow Microsoft to save your browsing activity including history, usage, favorites, web content, and other browsing data to personalize Microsoft Edge and Microsoft services like ads, search, shopping and news.

Important: Workbook links are considered potentially unsafe and must be enabled when you open a formula workbook.When you open a formula workbook, click Enable Content in the Message Bar to allow the workbook links to function. If you don't, Excel keeps the most recent values and disables refreshing the links with values from the data workbook.

When you’re away from your console or your Windows 10/11 device, you can still get ready to play your next Xbox console game. Use the Xbox mobile app, the Xbox Game Pass app, or the Microsoft Store on PC to remotely install games—so your games are ready when you are.

To help protect your privacy, the new Microsoft Edge sets tracking prevention to balanced by default. For increased protection, you can switch your tracking prevention to strict or block all third-party cookies.

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.

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.