1
Open the Settings App.
Go to Accounts - Sign In Options.
Disable the setting to use Windows Hello to log into your PC.
2
Click your Start Button, then just type netplwiz and press Enter.
On that utility should be a check box to remove the requirements for a password, select that, then you must enter your full Microsoft account login details when asked for that.
Save that setting and you should not be asked for a password or PIN when starting your PC.