Prolific PL2. 30. USB to Serial port adapter driver fails to install. I am trying to install a Prolific PL2. USB to Serial port 1ft. Guitar Freaks Download there. This particular one made by Sabrent. It seems that lots of people dont have any issues, and they have XP, Vista, and Win. I downloaded the latest. Vista driver installer from the Prolific website http www. ID3. 1, 1. 222. The driver says it installed. I then do a reboot. UK_AdeyFiles/uploads/2012/05/p-3787-UC232A_large.jpg' alt='Driver For Cable Usb To Serial' title='Driver For Cable Usb To Serial' />After system. I plugged in the cable. Windows detects I inserted the USB and displays the searching for drivers dialog. Odd I thought. I click to watch the status and it ends with the message Prolific USB to serial comm port COM4  FailedIn device manager it shows a question mark next to it. If its a Vista driver, why would it failCheck our website for more software from drivers to freeware software and updates. Most USB drivers have been listed here for printers, scanners and more. This question was previously answered with a pointer to a url that appears to no longer be working e. Im. Professional USB to Serial Adapter compatible with Windows 10, Mac and Linux. Shop U. S Converters for data products and fast tech support. Windows Serial Key Extractor'>Windows Serial Key Extractor. This is the USB driver for the RealTek RTL8187 Wireless adapter. Check your hardware before you install this driver as there are a number of versions for this adapter. What can I do to get this to install I also have another Vista machine that I tried it on, just to see if it was that machine or what. It failed too Thanks. Modules-USB-nine-pin-serial-cable-HL-340-USB-to-serial-cable-COM-USB-RS232-support.jpg' alt='Driver For Cable Usb To Serial' title='Driver For Cable Usb To Serial' />Download the latest drivers for your RadioShack USB to Serial Cable COM4 to keep your Computer uptodate. This package supports the following driver modelsProlific USBtoSerial Comm Port. The Prolific usb to serial driver download link from here http PL2303SA is a low cost and high performance USBtoSerial.