If the user double clicks on the program, it will come up with an error about a missing DLL file. It will then create two files: "Services.exe" and "User.dat". Double clicking on "Services.exe" will cause the service ExplorerServices to run. If you double click on "Calc.exe", it will cause it's icon to change. And will change it to a .dll file. It will then duplicate the program with a different icon. It will still run normally, however. Running "Cdplayer.exe" will also cause it to change into a .DLL file. Therefore, it converts any programs the user runs into to a .DLL file, and will duplicate it with a different icon.
If a start file is affected, the system may not boot when the user restarts.