You can insert a drop-down list of valid entries (also called a drop-down menu or drop-down box) in Excel to make data entry easier, or to limit entries to certain items that you define.

Learn how to reset or move OneDrive by unlinking and re-linking your PC.

If you loved the free solitaire games from earlier versions of Windows, we've wrapped them all up in one convenient app, the Microsoft Solitaire Collection.

Learn how to design professional-looking presentations with Microsoft 365. Create high quality, customized slides in a few clicks with PowerPoint Designer.

Training: Learn how to quickly get started with Microsoft 365, share and collaborate, work in Microsoft Teams, work from anywhere, and try cool Microsoft 365 features.

Microsoft support is here to help you with Microsoft products. Find how-to articles, videos, and training for Microsoft Copilot, Microsoft 365, Windows, Surface, and more.

Learn how to troubleshoot problems updating Windows. Find answers to common questions and issues installing Windows updates.

Your Microsoft account dashboard is where you can manage your personal information and security settings, keep tabs on your subscriptions and order history, and manage your payment and billing options. You can also organize your family’s digital life, track the health and safety of your devices, and browse or redeem rewards.

本文介绍如何在 Windows 8.1、Windows 8、Windows 7 或 Windows Vista 中使用系统文件检查器工具来解决丢失或损坏的系统文件的问题。

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