![]() Open your system's device manager by right-clicking on Computer (then.properties) and find the device manager.To determine if your adapter is suitable: Rather than confuse you showing how to install imperfect workarounds for Prolific drivers (and leave you dealing with machines that will still BSOD on you), our recommendation is just this simple: Ditch your Prolific-based adapters, and get USB-Serial adapters that use FTDI technology. It looks like Figure 3, but may also appear as a one piece unit with no wire. RacerMate has since engaged FTDI to build their own adapter from USB direct to the CompuTrainer stereo cable. They have all since moved to FTDI devices, and they all ship FTDI technology with current product. This issue affected cycling device manufacturers SRM, Saris-CycleOps, and RacerMate. If your PC is failing to blue-screen it is often the drivers for the Prolific devices. Prolific's behavior in providing drivers to its customers and cable manufacturers has been a failure. ![]() The advent of Windows Vista and 7 exposed the problems even more acutely. In fact, they never actually worked completely reliably on Windows XP. The short story is this: Prolific has been terrible at providing working drivers for modern operating systems. They looked like the picture in figure 2, and connected the USB port to the stereo adapter in figure 1. Adapters are common, and RacerMate provided USB-serial adapters containing devices and drivers by Prolific. When the traditional 9-pin serial port was phased out of most PC specs, its function was replaced by USB ports.
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