CPL, Windows Control Panel Item (.cpl)
The CPL System file format
CPL files are associated with the Windows Control Panel, exclusively found on Microsoft Windows computers and machines. Files with the CPL file extension are known as the control panel's items. These items include the mouse, sound, Networking or Displays. Furthermore, the items can be regarded as special libraries (DLL) within the Windows machine.
Technical details of CPL files
CPL files are very sensitive and heavily relied on by the Windows operating system. Thus, they should not be opened manually or even meddled with. They can be found in the Windows\System folder on a Windows computer. Whenever the Windows Control Panel is opened, the CPL files are loaded and executed automatically.