Locate the "Other devices" (often with yellow exclamation icons) labeled USB Serial Port Right-click each, select Update Driver , and choose "Browse my computer for drivers". Point the search to: C:\Program Files (x86)\Autokent MVCI MultiDriver X64\1.4.8 Configure COM Port : In Device Manager, ensure the cable's COM port is set to if the software requires a specific port. Configuring Techstream