Hi Turki Ali Omar,
Could you clarify what happens when you try to sign in? For example, does the Surface stop at the Windows sign-in screen, reject your PIN or password, or display a specific error message?
If possible, please share the exact error message or a screenshot with any personal information hidden. In the meantime, try selecting Sign-in options and signing in with your account password instead of the PIN or Windows Hello. This will help determine whether the issue is with Windows sign-in or the device startup process. Thank you so much for your understanding.
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.