If your Launch software cannot open the assigned COM port, another software program may be occupying it. Change the port number manually:

If unavailable, fall back to manual Device Manager updates using trusted driver packs.

Locate the downloaded installer file (usually an .exe or a zipped folder).

Connect your Launch diagnostic tool to the PC via USB or turn on its Bluetooth discovery mode. Press Windows Key + X and select .

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can be tricky because "75270" refers to a specific Bluetooth Special Interest Group (SIG) rather than a unique brand or model number . This listing is often associated with various generic Bluetooth 5.0 USB dongles using chipset IDs like the Realtek RTL8761B . How to Get Your Driver