Cannot login anymore to my Surface pro 6

Click Sign-in options

Choose the password instead of PIN

Enter your Microsoft account password

Hold Shift and click Restart from the login screen (Power icon → Restart while holding Shift)

Go to Troubleshoot → Advanced Options → Startup Settings → Restart

Press 4 to boot into Safe Mode

Try logging in there — Safe Mode sometimes bypasses the broken PIN issue

On login screen, hold Shift + click Restart

Go to:

Troubleshoot

Advanced options > Command Prompt > Type net user administrator /active:yes

Restart

Log in to Administrator account

Then fix your main account or create a new user Change or reset your PIN in Windows

Follow these steps in order to regain access to the Surface Pro 6.

1. Restart the device

• On the sign-in screen, select the Power icon and choose Restart.
• If updates are pending, choose Update and restart so Windows can finish installing them.
• After restart, try signing in again with the same PIN and password.

2. Try a different sign-in method

• On the sign-in screen, if Windows Hello (PIN/face/fingerprint) appears by default, switch to password sign-in and enter the account password.
• If there are multiple accounts, select another account in the lower-left corner and try signing in with that account’s password.

3. Sign in using Safe Mode If normal sign-in still fails, use Safe Mode to check whether a driver or update is causing the issue:
4. On the sign-in screen, select the Power icon.
5. Hold the Shift key and select Restart, keep holding Shift until the “Choose an option” screen appears.
6. Select Troubleshoot > Advanced options > Startup Settings > Restart.
7. When the options list appears, select 5 or press F5 for Safe Mode with Networking.
8. Sign in with the account password (PIN and biometrics are not available in Safe Mode).

If sign-in works in Safe Mode, once signed in:

• Check for Windows updates and install any available updates.
• Restart normally and test sign-in again.

4. Use another account (if available)

• On the normal sign-in screen, choose another account from the lower-left corner or select Other user and enter that account’s credentials.
• Once signed in, check for updates and review account settings.

5. If PIN/Windows Hello is the issue If the problem is specifically with Windows Hello PIN or fingerprint/face:

• Sign in with password if possible.
• Go to Start > Settings > Accounts > Sign-in options.
• For PIN (Windows Hello), select I forgot my PIN and follow the prompts to reset it.
• For fingerprint or face, remove and reconfigure them under Windows Hello options.

If none of these steps allow sign-in (no password works and Safe Mode sign-in fails), a repair or reset of Windows may be required, which can affect installed apps and settings. In that case, follow the guidance under “Restore or reset Surface for Windows” from the referenced documentation.

References:

• Troubleshoot Problems Signing In to Windows
• Troubleshoot problems with Windows Hello on Surface