Learn about Windows service packs and download the latest updates for Windows 10 and Windows 8.1

Get a brief explanation about logging on as an administrator and making changes to other user accounts on your computer.

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

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

Learn how to connect to a Wi-fi network in Windows and manage your current network connections.

了解在 Windows 中查找 BitLocker 恢复密钥的不同方法，并了解如何在系统上激活 BitLocker。

To download the offline installer for Internet Explorer 11, choose your language and system below.

Learn how to use the Analysis ToolPak to perform complex Excel data analysis. Explore the various data analysis functions available in Excel.

Xbox Support offers help for Xbox, Game Pass, and billing questions. Get advice and customer service in the Xbox Support community.

This article is for Outlook.com. If you're using Outlook for Windows, see Fixes or workarounds for recent issues in Outlook for Windows.. If you're having problems accessing Outlook.com, you can see the status of Microsoft Office Online Services at the Service Health portal.. If you're having problems sending or receiving email, read how to Fix Outlook.com email sync issues.