Photoshop: the grid is on in every image I open, have to turn it off every time

I activated Photoshop's grid via the keyboard shortcut, and now, every time I open an image (which wasn't necessarily saved with PS) has the grid on.
So now I have to turn the grid off for each and every image I open up in PS.
I tried closing the document window with the grid off, and quitting Ps with the grid off, but it doesn't go away.
This is hapening to me in MacOS, but did also happen in windows.

It's CS3.

The question is, how do I prevent this, and leave the grid off by default?

Try starting Photoshop with Shift+Command+Option held down to reset Preferences to defaults (Shift+Ctrl+Alt on Windows).

Instead of losing your Preferences, first try hitting Ctrl or Command + ' to disable the grid. THen, close Photoshop. Reopen and the grid should be off now.

Go to properties icon at the right hand of your photoshop,click on rulers and grid, then proceed to click on the grid column.That should turn it off. properties>rulers and grids>view grid.