Can anyone tell me the location of the 4 secrets inside Hogwarts?

Secret 1: Ground Floor
Cast depulso at the two pillars with fire outside of the door. This will cause a spongify tile to appear and the hogwarts stainglass window to open up. There will be a chest with some beans.

Secret 2: Second Floor
There are three book cases on the wall. Cast Alohomora on the one by itself and there will be a little room with a chest. Cast at it and 4 enchanted books will appear. Defeat them and another boockase will open revealing a secret tunnel.

Secret 3: Fifth Floor
In the room with the secret portraits (I believe this is the only room on the floor) there are picture all over the walls. There is one with a triangle above it and two smaller ones beside it. Cast at the two smaller ones and a room will appear with a chest

Secret 4: Seventh Floor
There is a picture (that looks somewhat like shakespeare) on the wall. Cast alohomora at it and a room and spongify tile will appear.

Well those are all the secrets in the school...hope this helps