If by "every time I use the computer" you mean each time you go away from the computer and come back to a lock screen, then you can change an option for this where you tell Windows never to require a password, or to only require it when waking the computer up from sleep. When starting up from a complete power off you will still have to sign in, but not each time you put it to sleep and then wake it up.
You will find this setting in Settings > Accounts > Sign-in options. Under "Require sign-in" section, click on the drop-down menu and pick an option.
This will evaluate the problem.
Hope This Helps You Out.