Do not plug the cable in yet. Install the driver for your cable chipset (Prolific 2303 or FTDI). For free software, you often need to install an older driver version (e.g., v3.2.0.0 for Prolific). Restart your PC.
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This article is for educational purposes only. Distributing or using copyrighted radio programming software without a license may violate Motorola Solutions' terms of service. Always ensure you own the legitimate hardware and consult a certified radio technician if unsure. Do not plug the cable in yet