If you can't see it, plug it in, open (Right-click Start button → Device Manager). Under "Other Devices" or "Universal Serial Bus controllers," you'll see an unknown device. Right-click → Properties → Details → Hardware Ids. Look for VID_067B (Prolific) or VID_0403 (FTDI).
To avoid malware, adware, or corrupted files, never download drivers from shady third-party driver-update software sites. Because Z-tek hardware relies on FTDI or Prolific chips, you can download the official, virus-free drivers directly from the semiconductor manufacturers for free. 1. For FTDI-Based Z-tek Cables Z-tek Usb To Serial Comm Port Driver Free Download