Autorun.inf
From Just Solve the File Format Problem
Autorun.inf (Autorun Configuration File) is a file associated with the AutoRun and AutoPlay features of Microsoft Windows. It typically is placed in the root directory of a removable media volume. It helps the operating system decide what to do when that media is connected. It was originally used mainly on CD-ROMs.
It is a kind of INI file. Despite the .inf extension, it doesn't use the standard INF file format.
Identification
One of the INI sections (often the only one) is named "[autorun]".