Whenever I open Photoshop it opens with a grid covering the image. This grid is useful maybe 20% of the time, but when I don't need it having the grid present is annoying. Yes, I know how to remove it- apple+h. That is simple, but removing it for 10-12 images EVERY time I open Photoshop is getting very annoying (it has always been like this).

The computers at school default to opening the ruler, which is equally annoying.. but at least then the picture isn't covered.

I am well aware of how to change the grids and all that within the preferences, but a "Do not display grid upon opening file" check box isn't there. This is probably a simple fix, where do I turn this off (I'm using CS if that matters..)