Your security key must be both FIDO2 and Microsoft-compliant. If you have any questions about your security key and whether it's compatible, contact your organization's help desk.

A security key is a physical device that you can use instead of your user name and password to sign in. Since it needs to be unlocked with a fingerprint or PIN, even if someone has your security key, they …

With passkeys, you can sign into your Microsoft personal account or your work/school account using your face, fingerprint, or PIN. Signing in with a passkey is simple and fast and helps protect you …

A BitLocker recovery key is needed when BitLocker can’t automatically unlock an encrypted drive in Windows. This key, which is a 48-digit number, is used to regain access to the drive.

Learn how to manage your Microsoft account security info and troubleshoot verification code issues.

Learn how to find a Windows product key for activation, and when you'll use a digital license instead.

After you've registered your security key, open the Microsoft Edge browser. When prompted to sign-in, insert your security key into your device's USB port and sign in to Windows using your security key PIN.

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

Instead of a password, you can use a security key to sign in to apps, websites, and, if you have a work or school account, even Windows. Use this section to change or reset your security key PIN.

Get security info and tips about threat prevention, detection, and troubleshooting. Including tech support scams, phishing, and malware.