My Safari webpage occupies about three quarters of the desktop on my laptop, and my Downloads folder is open and visible next to the Safari webpage. When I download an item, a "wheel" appears to fly from the webpage, where I clicked to obtain the download, to the Downloads folder and the download begins. I clicked on an image on a website and at the same time as the image opened in a new tab, something appeared to be download because a "wheel" appeared to fly to the Downloads folder. However, when I looked in the folder and in the downloads list at top right of Safari, nothing was shown. I looked at the "invisible files" using command+F etc, and there were numerous .filename items and 20 other items, mostly folders, but nothing that appeared to be created at about the time of the problem, except possibly two .abcdi files. Should I worry about these .abcdi files? Two questions:- Are there any other ways that a file could be hidden. How would malware or a computer nasty appear? Would it just have a .exe extension? As an Addendum:- I wonder it I am better off using Firefox because at least with that, I can set it so that it will "Always ask me where to save files", so that I can stop a download if I want to. If you downloaded an application with the 6 year old Safari it used to ask if I wanted to download an application, shame the 6.0.2 version no longer does that, or does anyone know how to set that up? .