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.

This page provides support links for home users and support phone numbers for business users.

Microsoft account sign-in helper If you can't sign into your Microsoft account, use the sign-in helper to identify the problem. How to use the Microsoft account sign-in helper The tool will ask you to enter the email address or mobile phone number you're trying to sign in with and check the details you provide. If it detects a problem with your account, we'll tell you what you need to do to ...

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

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

Sign-in options Usage Guidelines URL: Privacy Policy URL: ...

Learn how to reset or change your Microsoft account password. Get help with a forgotten Microsoft account password.

Learn how to sign in to your Outlook or Hotmail mailbox using your Microsoft account.

Hotmail is now Outlook.com. Learn how to sign in to access your Outlook.com, Hotmail, Live, or MSN email account.

Here are the most likely causes for an unrecognized charge: A Microsoft subscription has recurring billing enabled. Someone you know, such as a family member, bought something with your card. You can now investigate this on the Manage your payments page. A previously declined charge was charged again. A pre-order or split order was shipped. Someone made an in-app purchase from an app, game, or ...