Suppose you have installed the latest Windows update on your PC that is installed with Windows 10. You log into your account being a local user that is not set as Administrator. After installing the update, you may see that you cannot log into your account. Whenever you try to login, you are asked to enter a password despite the fact that you have never used any password.
The issue may take place if the installation of the update has not been done accurately. You can perform a System Restore to cancel the update and revert to the way your computer was working. You have to access the Control Panel from the Windows menu. Choose System protection option under the System tab and click on System Restore.