Discover the latest features in Office 2021, including new ways to create content, manage data, and communicate effectively.

Learn how to view, manage, and delete cookies in Microsoft Edge.

即使已开启其他防火墙，开启 Microsoft Defender 防火墙也很重要。 它保护你免遭未经授权的访问。 若要打开或关闭 Microsoft Defender 防火墙，请执行以下操作：

If you cannot open your Outlook data file or suspect that the file is damaged, use the Inbox Repair tool (scanpst.exe) to repair errors in the file.

Get answers to some basic questions about what two-step verification is, and how to set it up and use it to help keep your Microsoft account more secure.

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:

Learn how to change the refresh rate for your display in Windows to determine how smoothly motion appears on your screen.

This page provides phone numbers of Microsoft customer service.

Linking Microsoft personal accounts. It’s not possible to link, merge or combine Microsoft personal accounts, and you can't you transfer such things as your game progress or gamertag, account purchases and balance from one account to another, but accounts can be used side by side.

If you don't want to use OneDrive, the easiest solution is to unlink it. Follow the steps in Turn off, disable, or uninstall OneDrive, for how to unlink, hide, and uninstall OneDrive from your PC.