Common Problems:Windows 2000:. Right-click on the “Prolific USB to Serial Port”, then click Properties. Now click on “Port Settings”. Then click the “Advanced” button. Always uncheck “Use automatic settings”. Now select “Input/Output range”.

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Click on the “Change Settings” option. Type “02E8-02EF” in the Value box.

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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. COM 1: 03F8-03FF. COM 2: 02F8-02FF. COM 3: 03E8-03EF.

Programs for websites. COM 4: 02E8-02EFEnter the value, then click OK. Click OK again, then click Yes when the “Creating a Forced Configuration” window appears. Windows Generic:If you are having problems then check if you have installed the driver correctly. This is done by doing the following on your computer to check the installation.

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If the USB driver has been properly installed, “Serialio.com USB Serial Port” or “Prolific USB-to-Serial COM Port” will be displayed.Windows Vista: Start Control Panel System Hardware Device Manager.