Learn how to remove passwords from your Microsoft account to increase security.

Learn how you can use the free Microsoft Authenticator app to sign in to all your accounts without using a password.

Learn how to use and install mobile apps on your Windows 11 PC with the Windows Subsystem for Android™.

Use VLOOKUP, HLOOKUP, and other functions like INDEX and MATCH to search for and find data based on values you enter. This article gives you a quick VLOOKUP refresher, then links to more.

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。

An icon is added to the right of your Address bar, letting you sign in and customize the extension. To change your My Apps portal using the extension

If you're trying to add your Outlook.com account to Outlook or another mail app, you might need the POP, IMAP, or SMTP settings. You can find them below or by viewing them in your Outlook.com settings.. Outlook and Outlook.com may be able to detect your account's mailbox settings automatically, but for other non-Microsoft accounts, you may need to contact your email provider for their settings.

Outlook Data Files contain your email messages, calendar, tasks, and other items on your computer.

Learn about the recovery options in Windows. Find out how to reset your PC, go back to a previous version of Windows, or use media to reinstall Windows.

How to use the SUMIF function in Excel to add the values in a range that meet criteria that you specify.