获取 Windows 操作系统的官方支持和帮助信息，以及如何使用 Windows 的指南。

This article shows you how to use the Fn key and the F lock key.

Add an easy to maintain Table of Contents using heading styles that automatically updates when you make changes to your headings.

Learn how to sign in and create app passwords for Microsoft apps and devices that don't support two-step verification.

Discover how to earn Microsoft Rewards points through various activities and redeem them for exciting rewards.

Learn how to change the power mode on your Windows PC to preserve your battery, limit notifications, and background activity.

Learn how to get Microsoft Store updates for your apps and games. Download the latest versions of Microsoft Store apps and games.

Learn how to set up a connection to a proxy server on your Windows PC.

Learn how Smart charging in Windows can help your battery last longer over time.

Occasionally, dates may become formatted and stored in cells as text. For example, you may have entered a date in a cell that was formatted as text, or the data might have been imported or pasted from an external data source as text.