The Microsoft Authenticator app helps you sign into your accounts when you're using two-step verification.

Learn how to use the taskbar features in Windows. Hide the taskbar, pin an app, change the location, and more with taskbar settings.

Find everything you need to manage your Microsoft account, XBOX profile, and more.

需要有关 XBOX 主机、XBOX 游戏或 XBOX 网络的帮助?了解如何与我们联系。

Learn how to use Snipping Tool to capture a screenshot, or snip, of any object on your screen, and then annotate, save, or share the image.

Support for Office 2021 will end on October 13, 2026. Learn more about your options for Office.

Open a new email message. On the Message tab, select Signature, and then select Signatures. In the E-mail account list, pick the email you want. Under Select signature to edit, select New, and type a name for the signature. Select OK. Type the signature you want in the Edit Signature box. Format the signature as needed, and then select Save. More on creating signatures

Summary A BitLocker recovery key is needed when BitLocker can’t automatically unlock an encrypted drive in Windows. This is a 48‑digit number that lets you regain access to your drive.

With System Restore you can revert your PC's state to a previous point in time. This can be particularly useful when troubleshooting issues caused by recent changes, such as software installations, driver updates, or system settings modifications. By using System Restore, you can undo these changes without affecting your personal files, providing a safe way to resolve problems without losing ...

Learn how to activate Windows using a product key or digital license, check your activation status, and link your Microsoft account.