I would suggest you to try the following steps and check if it helps.
Step 1: On-Screen Keyboard
You may use the accessibility options to pop open a on-screen keyboard and type the password ***** there to make sure you are typing the correct password.
If the issue persists,
If you see your email address listed there, it must be a Microsoft account. You will be able to reset the password ***** log in if your PC is connected to internet.
Please let me know if I have misunderstood, or if you are talking about a different username/password.