helping out an old buddy

Hey, sorry to post this in here but my windows explorer window has gone wonky!

Can anyone tell me the name of the registry key that your supposed to delete when Windows Explorer keeps loading up with half the form offscreen? When I maximise it, it winds up with the top left corner in the middle of the screen and the rest of it out to the right and botton. I can't drag it when its like that either, i just have to restore it again so it can move.

I remember I deleted something from the registry that stores the position of the window. But I cant remember what it was.

Help:(