how to change computer password without enter old password
first of you open command prompt
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2= click run as administration and click enter
3=and enter a code is =netuser and hit enter
4=and you see all account on your pc and computer
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your command prompt name is show your computer nameand you have to select the name that runs in your computer
after that you have type another commad in your command prompt
5=first of all you have to type net user after that you have to type the one which which you do not have your use after that you have to type the new password you want to set now
code is=netuser desktopmgfg 123123
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and your passsword is set succesfully congratulations