Learn about the differences between a Microsoft 365 subscription, Office 2016, and the free Office Online apps.

How to freeze panes in Excel to keep rows or columns in your worksheet visible while you scroll, or lock them in place to create multiple worksheet areas.

Do you need some help installing Quick Assist? For the best experience, download and install the new version of the Quick Assist app from Microsoft Store. If you have problems installing Quick Assist, here are some steps to try to get it installed and working properly.

Learn how to recover deleted items, such as email, contacts, calendar appointments, and tasks in Outlook.

使用 vlookup、hlookup 和其他函数（如 index 和 match）根据您输入的值搜索和查找数据。 本文将让您快速回顾 vlookup，然后链接到更多内容。

Learn how to troubleshoot USB-C problems in Windows and fix USB devices, ports, and adapters not working properly.

Learn how to locate and manage your app permissions on Windows devices. Some apps or games need specific permissions to work properly.

How to access your Microsoft account? If you have confirmed that your email is a Microsoft account, you can access it by following these steps:

How to calculate the number of days, months, or years between two dates using the DATEIF function in Excel.

Learn how to find which version of Windows operating system your PC is running and device specifications.