Disk Knight is a security application which is supposed to protect the computer from threats that infect USB based drives.
Disk Knight copies itself into <Windows> folder and subsequently copies itself, without asking for the permission from the user to any inserted USB disk drive.
Disk Knight creates an autorun.inf file which automatically launches the main application file (usually knight.exe).
Disk Knight monitors the system and displays a dialog when a new process is about to be launched. The dialog gives the user an option to allow or block the execution of the new process.