Against all advice, I write all my passwords into a note book.
Have never used password to get into Windows, even though Win 10 forces it on you it can be made an invisible background task, so in effect logs you in automatically.
I have currently 4 computers and none require a password to open.
If you have forgotten your Win 10 password and need to get in, then create another one.
Simply press Windows logo key + X on your keyboard to open the Quick Access menu and click Command Prompt (Admin). To reset your forgotten password, type the following command and press Enter. Replace account_name and new_password with your username and desired password respectively.