please help me

windows fonts

recently my computer have something wrong, the fonts of the windows was changed, and the symbols of the windows to minimize, and maximize and close in the right-up the windows is changed to 0,1,2, also does some other parts symbols of the windows. and all the characters in my matlab software is changed to a special symbol although it can run,
who can help me to handle the problem, thank you very much
 
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