defaulticon=path\iconname.ico
Specifies an absolute path on the CD to locate the icon that represents the AutoPlay-enabled CD in the Windows 95 user interface.
path\iconname.ico
Absolute path and file name of the file containing the icon. You can also specify a .bmp, .exe, or .dll file. If a file contains more than one icon, specify the resource number (index) of the icon in the file to use.
If both icon and defaulticon commands are present in an Autorun.inf file, AutoPlay uses the icon specified in the defaulticon command.
When the drive does not contain an AutoPlay-enabled CD, the system uses a default icon in its place.