1. First, confirm whether the password is correct through some simple steps.
Click the "eye" icon in the password area and check the password before entering again.
2. During the system upgrade process, verify that the keyboard layout has not been changed, causing you to enter an incorrect password. Press Win key Spacebar to check keyboard language and layout. Hold down the Win key and press the space bar multiple times to change the keyboard layout.
3. Use another device to verify that you can successfully log in to the Microsoft official website through this Microsoft account and password.
Now you have confirmed that you can log in with the correct password. If you have logged in from Windows 8.x but never from Windows 10, you may be affected by this issue. If you want to resume use, you must roll the operating system back to Windows 8.x and ensure that you enter the correct password when you log in for the first time.
(1) Insert the Windows 10 installation media and boot the media into the Windows Recovery Environment. You can create media from another computer using the Media Creation Tool.
(2) In the Windows recovery environment, select Troubleshooting - Advanced Options.
(3) Select Go back to the previous build. If this option does not appear, select "See more recovery options" to view it.
(4) Follow the instructions displayed on the screen to roll back your previous Windows 10 version. Update Windows 10 again and log into your account.
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