removed workstation from domain and restarted unable to login with administrator account

Hi , I want to change my PC name but not able, because of some group policies,so I removed the pc from domain and changed the name and restarted after that I am not able to login with local administrator to login to my PC now ?
Jacob GlassmanAsked:
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Simply boot to safe mode. In safe mode, the local administrator account will be unlocked and the password will be empty unless set to another value by you.

To get to safe mode, keep shift pressed while clicking on restart.

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Windows 8

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