RacerMate is defunct, and nobody makes the usb to stereo adapters. , MillTech Marine, USBNow offer USB-to-9pin COM adapters if you have the 9-pin to stereo units as in fig.Here are sources for FTDI-based adapters. We have seen failures with Keyspan as well. If it says Prolific, you are best to throw away your adapter, and uninstall the driver. You should see USB-Serial Port and a Com# assignment, right click.properties.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:
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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.
![erg videos computrainer erg videos computrainer](https://i.ytimg.com/vi/a30b-YpDb0c/maxresdefault.jpg)
The advent of Windows Vista and 7 exposed the problems even more acutely.
![erg videos computrainer erg videos computrainer](https://media.dcrainmaker.com/images/2009/02/in-depth-computrainer-review-9.jpg)
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.
![erg videos computrainer erg videos computrainer](https://media.dcrainmaker.com/images/2014/11/KinoMap8-720x480@2x.png)
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.