Right-click the "Unknown Device" (often listed under "Other devices").

: Many Autocom CDP units use FTDI chips for USB communication. If standard drivers fail, the generic FTDI Virtual COM Port (VCP) drivers

If you already have the software but Windows doesn’t recognize the USB interface:

For a successful installation, you typically need to point Windows toward the specific USB driver files found within the software installation folder. Update drivers through Device Manager in Windows

: Sites like Driver Scape and DriverHub provide direct downloads for Autocom CDP+ USB and related serial port drivers for Windows 10, 11, and older versions.

After installation, the device will appear under as “Autocom CDP (COMx)”. Note the COM port number (e.g., COM4). You will need this for diagnostic software configuration.