My son accidentally deleted it. I can click on Finder and find the blue Applications folder. I've tried to drag it onto the desktop then down to the dock but it doesn't work?? A guy at Best Buy said to click on the Finder icon and a list of folders showed up on the left side along with the folders on the right. He just drug the folder down to the dock but I don't get the list of folders on the left side. I'm not sure what to do??