A PIN is a set of numbers, or a combination of letters and numbers, that you choose yourself. Using a PIN is a quick, secure way to sign in to your Windows 10 device. Your PIN is securely stored on your device. If you aren't signed in to your device and you want to reset a PIN, here are some things to try.
If you see I forgot my PIN below the PIN text box, select it and follow the instructions. If there are multiple accounts on the device, choose the one you need to reset and follow the instructions. This will take you to Enter your password. Follow the instructions to sign in. Next, select Start > Settings > Accounts > Sign-in options > Windows Hello PIN > I forgot my PIN and then follow the instructions.
If you don't see I forgot my PIN, select Sign-in options > Enter your password and sign in. Next, select Start > Settings > Accounts > Sign-in options > Windows Hello PIN > I forgot my PIN and then follow the instructions.
Note: The PIN you use to access your device is different from your Microsoft account password. If you need to reset your Microsoft account password, go to account.microsoft.com, select Sign in and follow the instructions. Next, select Your info > Profile > Change your password > Change and then follow the instructions. If you're worried that someone has unauthorized access to your account, see Recover your Microsoft account and Security info & verification codes.