If you don't have your antivirus set to scan incoming files make sure you scan any DL files before you open them, especially the exe files. Also be aware that some exe files of applications are exactly that-just exe files. If you get errors or "cannot find/locate APPLICATION" messages it is likely due to the executable trying to locate the application master file which of course doesn't exist. If you DL an executable that is only a couple of thousand KB then you can bet dollars to donuts that you have only the executable and not the entire program.