My problem is that after I download any files whether musics, pictures or even software I can't open it. No error codes or messages. When it was downloaded it was just fine. But when I try to open it, nothing. I'm using Windows 7 Starter, Mozilla Firefox.
I had followed what you have suggested but nothing happen. I still can't open my files. When I clicked OPEN CONTAINING FOLDER, nothing came out. But it was just fine when I downloaded my files. It just that I can't open what's inside them. I still can open my "Downloads" folder.