In your computer, maybe it is another comm port. The driver must be numbered as '2.0.2.8' and dates accordingly. Click Driver in the Windows Properties section. Scroll down to the LPT/ COM port then double click Prolific USB to Serial Comm Port. Expand Ports (Com & LPT), right-click Prolific USB-to-Serial Comm Port (Com5) to select Update Driver Software. Go to Control panel, enter System to access your Device Manager. Open device manager by right-click Windows icon and choose it from the results. July for the ones from the download page) and so Windows prefers it over them. It will help Windows 10 recognize the devices again and restart it. 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. Unplug all USB-To-Serial adapters from your computer - and double-click on 'PL230364bitInstaller.exe' When it prompts you, plug in one (1) of your USB-To-Serial adapters and click 'Continue'. Then "pnputil /enum-drivers", and in the output look for Prolific drivers other than the ones from the previous step. VID067B&PID2303 for 'Prolific USB-to-Serial Comm Port' Steps: Download and save the 'PL230364bit Installer.exe' by clicking here. 7) Right-click on the entry with the error to open a window and select. It will add the two driver packages to the driver store and tell you what oemXY.inf files it has assigned to them. In Ports (COM & LPT) the Prolific USB-to-Serial Comm Port (COMx) will appear. 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. In the Properties window, go to the Driver tab, and click on Roll Back Driver. Find Prolific USB to Serial Comm Port, right-click on it, and select Properties. There is a working driver at, a bit down the page listed as "DCHU (for PC Vendors)". Save your personal devices and preferences Easy access to support resources Create personal account Business/IT accounts. If this is true, you have to downgrade your driver back to an old version.
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