When I downloaded Mavericks OSX I upgraded from Snow Leopard; instead of doing a clean install. Therefore, some 3rd party apps were left untouched. I decided to manually clean out some these apps and plists. One file plist I am unsure about is: com.user.UninstallAD.plist Any ideas what or where this file is from? Is it safe to delete. I am holding it in my trash for now. It's been there for one day. Thanks for your help. PS I cannot find anything on it via Google.