To start, I'll admit that I'm very new to Macs and OS X. I downloaded a quicktime file and saved it to my desktop. I want to delete the file, but everytime I try to put it in the trash it says the file is being used by another task. I've tried closing all applications, restarting, shutting down, but the system still says this file is being used by another application. I even tried renaming the file and changing the .mov extension, but it still won't let me delete the file. Does anyone have any suggestions? Thanks!