I am trying to install a Prolific PL2303 USB-to-Serial port 1ft. Adapter cable. This particular one made by Sabrent. Craftsman staple gun 68514 manual. USB Serial Adapter Drivers Page. For windows usb serial adapter cables using prolific chip also mac and linux drivers for usb serail cables as well as x86 64-bit. Serial adapter is constructed for reliable serial port expansion in tight workspaces and specialized server/PC environments; Measures 2.45'H x 0.72'W x 4.72'L. Usb To Serial Port Adapter Driver DownloadIt seems that lots of people don't have any issues, and they have XP, Vista, and Win7 drivers available for it. I downloaded the latest Vista driver installer from the Prolific website (, 12/2/2009). The driver says it installed. I then do a reboot. After system is up, 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) - Failed' In device manager it shows a question mark next to it. If it's a Vista driver, why would it fail? 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 for the quick reply. I wasn't installing as the 'Run As Admin' link at first, even though my account has Admin rights. But yes, then I started doing that, no change. However, I'm happy to say I found the problem! After posting this, I did a search in these forums and came across ONE other post that had lots of feedback.someone in that one posted a link to drivers which I had not tried.
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