prolific usb to serial comm port driver problem

Select the link for downloading a driver installer.ġ1. To do this, see our Downloads page and go to the section on Cable Links or USB converter as appropriate. After restarting Windows, install the driver again. Disconnect your cable link or USB to serial converter from the computer and restart Windows (after printing out this page so that you can continue to follow these instructions).ġ0.

If a yellow exclamation icon was found in either of the previous points, right click on the device and click Remove, Delete, or Uninstall (depending on your version of Windows). See whether it contains a device that is marked with a yellow exclamation icon.ĩ. If there is a category called Other Devices, open it up by double clicking on it.

If there is a yellow icon showing an exclamation mark next to the port, it means that there is a problem with the driver or the device.Ĩ. Please reconnect it for the remaining points.ħ. If the listed device disappears, this is a good indication that it did refer to the link or converter. You can check whether the listed device refers to your cable link or USB converter by unplugging the link or converter. If you are using a true serial port, look for one called 'Communications Port (COM1)” or similar.Ħ. If you are using an old type USB converter, look for a port called “Prolific USB serial port” or similar. If you are using a USB cable link, or a new type USB converter, look for a port called “USB serial port” or similar. Each new line will be something like 'Communications Port (COM1)”ĥ. This will produce additional lines in the list of devices, one for each port that the computer has. In the list of devices, double click on 'Ports (COM & LPT)'.Ĥ. Make sure View / Devices by type is selected.ģ. Under other versions of Windows, open a 'Computer' window and select 'Control Panel' (it may also be necessary to select 'Performance and Maintenance' or “System and Security”) then “System”, “Hardware” and finally “Device Manager”.Ģ. Type Device Manager into the search box and then select Device Manager from the list that appears. In the main Settings window, there is a search box that says “Find a setting”.

If your USB cable has a power supply unit make sure it is switched on.ġ. Make sure your USB cable or USB converter is attached.

This is for USB cable links, and for serial cable links that are being used with an old or new type of USB to serial converter.

Prolific usb to serial comm port driver problem