July for the ones from the download page) and so Windows prefers it over them. The problem is probably that the non-working driver is the newest (September 2021 vs. I had only one other entry, a "ser2pl.inf" version " 3.8.40.0".ĭisconnect the device, and "pnputil /delete-driver oemXY.inf" with the INF file you located in the previous step.Ĭonnect the device again, and it should work, at least, it does for me. 41 Vine Street Magill SA 5072 Phone: Fax: Installation Notes for Prolific PL-2303 USB Driver for USB - RS232 Adaptor Cable 1. Then "pnputil /enum-drivers", and in the output look for Prolific drivers other than the ones from the previous step. When it prompts you, plug in the PL2303 USB-To-Serial adapter and click Continue. Unplug all USB-To-Serial adapters and Double click on the installer PL230364bitInstaller.exe. Or you need to make sure the Prolific USB to Serial driver version is compatible with the Windows system to get the peripheral devices recognized. Updating the prolific COM port driver is a key solution for you. It will add the two driver packages to the driver store and tell you what oemXY.inf files it has assigned to them. Download and Save the PL2303 Installer Program here. After checking the driver status in the device manager, numerous users found that the PL2303 driver wasn’t working as normal. What I did is this:įirst install the downloaded driver by unpacking the zip file and "pnputil /add-driver *.inf /subdirs /install" (the /install is probably not necessary) from the extracted "Win11_DCHU" directory. Getting it installed is a bit tricky, it seems. PL2303 issues (Prolific USB to Serial Drivers) Win 11 I have come across an issue that I dont if anyone has come across and found a fix I have a few handheld radios that I need to update the frequencies and when I connect to the USB, it fails to connect.
There is a working driver at, a bit down the page listed as "DCHU (for PC Vendors)".
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