I am running 10.8.2 on my Mac Pro desktop tower. Not always, but every now and then with no reason I find "x.app" in my trash. When I try to empty the trash I get a message saying it can't because x.app is in use. The trash won't empty and when I take a look at the file it says it was last modified December 2, 2017 at 7:42 AM. How do I get rid of this once and for all. Thanks in advance to any "Apple genius"who can help!