Every company selling these Prolific USB dongle claims they are selling the correct version and chipset but Windows simply didn’t detect these when I’ve(or most people) used the Prolific Driver. There’s seems to be a lot of threads around different website/forums discussing this problem, but I just couldn’t find a fix and the reason for it. To make it worse, I got this Prolific USB to Ethernet/RJ45 adapter directly from IBM. There are no compatible drivers for this device.Device driver was not successfully installed.The drivers for this device are not installed.You normally get a variation of the following messages Right-click properties shows the following:Ī device which does not exist was specified. The Yellow triangle next to Prolific USB-to-Serial Comm Port (COM4) means correct driver version is not installed. My Device Manager in Windows shows the following: This zip file contained 3 files and obviously I ran PL2303_Prolific_DriverInstaller_v1170.exe file to install Prolific Driver in good faith. Hit the first result (that looks like the official Prolific Page: ) and downloaded PL2303_Prolific_DriverInstaller_v1.17.0.zip. So I used good old trusty and searched for “Prolific Driver”. So yes, Windows didn’t pick up the driver. Plugged in the Prolific dongle and this is what I get via Device Manager: ![]() Specific driver for my USB dongle is Prolific PL 2303 Driver (VID_067B&PID_2303) What I did (this didn’t work) This guide should work for Windows XP, Windows 7, Windows 8, Windows 8.1 and Windows 10 and both 32 bit or 64 bit. This guide shows how to fix Prolific USB to Serial or Prolific USB RJ45 Ethernet Code 10 error. I use Prolific USB to RJ45 Ethernet dongle and I found that recently in almost any Windows version, I get Core 10 error. USB to Serial Adapter – Prolific PL-2303 – 3 ft / 1m – DB9 (9-pin) – USB to RS232 Adapter Cable – USB Serial
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