Using Authenticator as a way to sign in. If you have turned on passwordless, two-step, or multi-factor authentication for your account, use the following steps to sign-in:

Learn how to change Microsoft account email address or phone number using aliases to sign into your Microsoft account.

了解如何从 Windows 10 家庭版升级到 Windows 10 专业版或从 Windows 11 家庭版升级到 Windows 11 专业版，包括如何使用有效产品密钥或 Microsoft Store。

You can use the Inbox Repair tool (SCANPST.EXE) to diagnose and repair errors in your Outlook data file. The Inbox Repair tool checks the Outlook data files on your computer to see if they're in good shape.

How to use the FILTER function in Excel to filter a range of data based on criteria you define.

Learn how to use the Activation troubleshooter to resolve common activation issues in Windows.

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To edit a PDF, open it in Word. This works best with PDFs that are mostly text. PDFs of book chapters or something that looks like a manuscript from a copier won't be formatted well in Word.

Use the new Outlook for Windows for coordinated Mail, Calendar and People apps on Windows 11.

Learn how to update your Xbox console offline.