Windows password problem

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Hello,

hai, it is a new laptop with windows 7, i only created administrator password,i didn't give any user account name and password, (yesterday when i am try to open some players to watch films, i have seen pop up sing came and i open it and i click to open for temporarily and it show some error. i close it and shutdown. Next day i open windows open normally and immediately it closed.
i can't go in to windows in normal mode but i can go in safe mode.). if i type administrator password correctly, it is showing your account has been disabled. please see your system administrator. If i give wrong password, it is showing incorrect password. Then i went in to safe mode and i remove the password, again the same (but it is not asking any password). can u give me solution