I presume you're running Windows 10? The implication of your question is that you can decline to give a password and continue to use basic functions. I've not seen that, but it could be offering limited "guest" access to the computer. A screenshot would be helpful if you can't get sorted ( press the PrintScreen key to copy the screen to the clipboard, then paste it into any graphics or drawing package).
I suspect the answer to your problem lies in Settings - Accounts or Control Panel - User Accounts, where you can specify login options. Browse around there and I think you'll find the answer.
crwdns2934105:0crwdne2934105:0
crwdns2934113:0crwdne2934113:0
crwdns2915270:0crwdne2915270:0
crwdns2889612:0crwdne2889612:0
3