Learn about the UNIQUE function, which returns a list of unique values in a list or range. UNIQUE is in a class of functions called dynamic arrays.

Create a system restore point. Communities help you ask and answer questions, give feedback, and hear from experts with rich knowledge.

了解如何使用设备管理器更新Windows中的驱动程序或重新安装驱动程序。

Use inbox rules to automatically perform specific actions on email messages that come into your inbox.

Calculates the number of days, months, or years between two dates.

Get troubleshooting steps for when you can't sign in to the Xbox app.

About Windows 11 in S mode. Windows 11 in S mode is a version of Windows 11 that's streamlined for security and performance, while providing a familiar Windows experience.

With Edge Chromium, you can add multiple profiles. Profiles allow multiple users to operate in a shared environment while maintaining access to their personalized browser settings, bookmarks, and extensions.

Learn how to install and use OneDrive to sync files between your Windows device and the cloud.

By importing a snapshot of your Google calendar into Outlook, you can see it alongside other calendars in the Outlook Calendar View. To keep the imported calendar up-to-date, subscribe to the Google Calendar in Outlook.