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.

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

Learn how to create installation media for installing or reinstalling Windows.

Contact Microsoft Support. Find solutions to common problems, or get help from a support agent.

Find out how to submit a request for a refund for a purchase of digital Xbox content.

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

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How to add a signature to your Word documents. You can also use the Signature Line command in Word to insert a line to show where to sign a document.

Microsoft Support

Microsoft Support