I can't log out of Windows

I have created a new windows account and now before my computer starts up,it would require me to enter a password before it goes into the computer desktop and plus i couldn't sign out of my windows account.Please tell/help me how to solve this problem.I do not wish to sign in before starting up my desktop and tell me a way to sign out of my windows account.When i sign out,it would just bring me back to sign-in before desktop.I regret creating this account.Please Help

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