Answer:
Go to the pic of the fat lady on the wall there will be a scribble on the wall click on it and it will say Michael and then tell the lady that's the password she will open up next click on the black area where she was then in harry's room go to his bed click on the pillow there will be a wond then click on it. if you havent grabbed the books from out side on the shelf grab hem click on the blue book there will be a spell relashio go back into harry's room click on the wand then the chest and then click the spell relashio and the chest will open inside there will be a cloak pick it up then click on it and click use you will be invisible then you can walk past anyone.