setup utility how to clear password?

I take it you want to log onto your computer without a password in future. This is a bad idea unless you're certain no-one else has access to it. However, it can be done.

First, click the Windows 10 Start menu and type netplwiz into the Search bar and select the same-named program from the results. 

After launching Netplwiz via the Start menu, you should see the user accounts screen.

This window gives you access to Windows’ user accounts and many password controls. Right at the top is a checkmark next to the option labeled "Users must enter a username and password to use this computer". Uncheck that. 

Next, enter your current password. The passwords must match.  

When you click Apply it will prompt you for your current password. Enter it twice and you’re finished. The next time you reboot, or your PC wakes up from a nap, you’ll no longer need to type in your password.