Describes how to troubleshoot problems that occur when you install, uninstall, or upgrade a program on a Windows-based computer by using Windows Installer.

Export Outlook email, contacts, and calendar to move them to another computer or so that you can make a backup of your information.

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：

Learn all you need to know about sharing your Microsoft 365 Family subscription benefits.

Alternatively, you can install any website by going to the top corner of the browser and select Settings and more … > Apps > Install this site as an app.

Learn how to add all your different accounts to the Microsoft Authenticator app.

Use the Block or Allow settings in Outlook Web App to help control unwanted and unsolicited email messages.

Use family safety settings to block inappropriate websites and searches on Windows, Xbox and mobile devices.

Learn how to create survey forms with Microsoft Forms and easily share them with students, parents, and colleagues.

To change your speaker, microphone, or camera settings in a Teams meeting or a call, go to Device settings.