Delta Core i3 Series Operation Manual page 46

Step 4
Click "Next" after entering the 25-character product key, which is combined with alphabet and numbers.
Step 5 Check the "I agree the license term" checkbox before clicking on "Next".
C h a p t e r 4 I n s t a l l a t i o n o f t h e O p e r a t i n g S ys t e m
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