When you enable an add-in, it adds custom commands and new features to Microsoft 365 programs that help increase your productivity. Because add-ins can be used by attackers to do harm to your computer, you can use add-in security settings to help protect yourself.

Learn how to install Windows 7 Service Pack 1 (SP1). Includes info about how to get the download, requirements, and more.

If you’ve forgotten your Microsoft account password, learn how to do a password reset online or by using your Xbox console.

在 “个性化设置背景”旁边的列表中，选择“图片”、“ 纯色”、“ 幻灯片放映”或“ Windows 聚焦 (”，) 查看来自世界各地的新图像。

Insert a hyperlink in a worksheet cell or specific chart element to link to a related file or Web page in Excel. You can also modify or remove hyperlinks.

Learn how to edit, save, and create a template in Office. You can create and save a template from a new or existing document or template.

To import a text file, you can open the file or import the text file as an external data range. To export a text file, use the Save As command.

There are several ways to calculate the difference between two times.

Discover how to use Microsoft Phone Link to connect your Android or iPhone to your PC for seamless access to notifications, calls, and apps.

Learn how to unlock your Microsoft account and resolve 'account has been locked' error message.