Method 1.
Click the "Start" menu in the lower left corner and enter cmd in the search bar, and the command line interface will appear.
Enter the following command in the command line interface: net user% username%123456789.
Where 123456789 is the power-on password.
In this way, the computer is set with a password.
Method two.
Right-click on the desktop computer or my computer, and a drop-down menu will appear, and select "Manage".
The computer management interface appears, and local users and groups are found.
Click Users, and the list of users will appear on the right. Right-click the account to set the password, and a warning interface will pop up. Click Continue, and then set a password.