ACER ASPIRE E E5 -5736-389U LAPTOP . I FORGOT THE PASSWORD, WANT TO RESET IT

I HAVE A ACER ASPIRE E E5 -5736-389U LAPTOP . WHICH WAS USED BY MY YOUNG BROTHER ,  HE PASSED AWAY 3 MONTHS AGO, AND NOW WHEN I TRIED TO OPEN IT  ITS ASKS FOR PASSWORD, I TRIED SOME BUT FAILED , SO PLS HELP ME TO RESET IT

THANKS 

REGARDS 

 SONY JAMES