Look in the Surface app. The easiest way to find which Surface model you have is to use the Surface app. It shows the model name of your Surface device and each Surface accessory.

The Program Install and Uninstall troubleshooter helps you automatically repair issues when you're blocked from installing or removing programs.

This page provides phone numbers of Microsoft customer service.

如何激活预安装在新 Windows 10 计算机上的 Office 或使用新的产品密钥。

Outdated software can cause problems with a Windows upgrade, so removing old or nonessential applications can help. If you plan to reinstall the application later, make sure you have the installation media and all required activation information before removing it.

Learn how to troubleshoot Windows activation errors. Browse common activation errors and learn what you can do to fix them.

Focus is a new feature in Windows 11 that helps you minimize distractions. To help you stay on track, it integrates with the Clock app with features like a focus timer and music integration.

Explore subscription benefits, browse training courses, learn how to secure your device, and more.

Download pre-built Excel calendar templates. Stay organized with a variety of Excel calendar layouts and templates you can easily adapt to your needs.

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.