Below we will show you how to work your way around the problem. If you have followed these process through and you still see the same error go to your device manager. Follow directions in Device Manager to download the correct driver.
The three solutions listed in this article have proven to be quite helpful in fixing a Prolific USB to Serial driver not working on Windows They may appear confusing at first but if you follow each step in detail you can resolve the issue. The ZIP file contains the drivers an end-user would need. Bear in mind that even though other OSes might be compatible, it would be best if you applied this package only on specified platforms.
In addition to that, as technology evolves from one day to another, we recommended that you always use the latest software available. That being said, click the download button, get and apply the present version and enjoy your newly updated system. Also, constantly check back with our website to find out when a new version is available. Click the "Advanced" button. Launch the software to use with the new COM port. Click on "Change Settings". One of the common reasons that software may not work as expected with a USB-Serial adaptor when the devcie is properly installed, is many older programs and even some new ones only support a limited number of COM ports e.
Note the COM port must have ' in use ' listed next to it, if it does then another device with that name is already installed in the system. After selecting the desire port number, click 'OK. This value will change the port to COM 4. If COM 4 is in use, you must choose another port. The values for each port are. Click OK.
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