I need to edit teh ini file so the output will be opengl and not overlay, otherwise with the latest Nvidia update all Dosbox games have green screen, But when I tried to save the change, whether by opening the notepad or clicking on edit through right-click, it always says "Access denied". What can I do?

Also for some reason the integrated graphics card doesn't work with some dosbox games at all, dosbox just opens and closes.

Try to give the folder admin rights.

Let me guess, Program Files?

Wouldn't 'acute' problem be a kitten that scratches up the furniture or a puppy that refuses to be potty trained?

There's nothing cute about poop.
Have you ever gotten out of bed at night and walked around only to feel your pet's poop curl between your toes like some kind of horrible Play-Doh?
That shit ain't cute.

Oh, I forgot about that trick, thanks! I was wondering what was the cause of that. Nope, C:/GOG/xxx. :D