okif this is the old ps then when you try opening the program you will get a screen that says photoshop blah blah blah and there will be a little bar at the bottom of it it should be all blue? and says trial expierd? then on the same screen you will have a have serial code option if i rememebr right jsut tpy in the code and it should have you folow instrutions after thatif you have any more questions i will try to help