I got my mac a year and a half ago, i switched from an acer. To transfer all of my files over I just pluged one into the other and moved the whole shebang. Now I have a situation, there are all sorts of acer files (like things that helped run the acer) cluttering up my mac. When I try to delete them (with the keyboard) it doesn't do anything, doesn't even make a sound, no pop ups, no nothing. When I move it with my mouse to the trash it says "The item Acer cant be moved to the Trash because it cant be deleted." How do I delete this useless and frustrating file.