Older portable laptops often had internal dial-up modems that functioned as a COM port.
Navigate to: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\4d36e96b-e325-11ce-bfc1-08002be10318 . pnp0500 windows 10 portable
Look for a device with a yellow exclamation mark, often under "Ports (COM & LPT)" or "Other devices". Right-click the device and select Update driver Search automatically for drivers Older portable laptops often had internal dial-up modems
: Connecting to industrial PLCs, legacy medical devices, or networking hardware (via console cables). legacy medical devices