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1. #PROLIFIC USB TO SERIAL COMM PORT COM4 WARNING INSTALL#
2. #PROLIFIC USB TO SERIAL COMM PORT COM4 WARNING DRIVERS#
3. #PROLIFIC USB TO SERIAL COMM PORT COM4 WARNING UPDATE#

Driver can auto-download via Windows Update (Windows 7, 8, 8. Windows Vista, 7, 8, 8.1 Certified WHQL Driver Compatible with Windows 2000SP4 & Server2003 Installer version & Build date: 1.12.0 () (For PL2303 HXA, XA, HXD, EA, RA, SA, TA, TB versions) This is the Prolific website read on the driver I installed:ĭownload File: PL2303_Prolific_DriverInstaller_v1.12.0.zip July for the ones from the download page) and so Windows prefers it over them. Expand Ports (Com & LPT), right-click Prolific USB-to-Serial Comm Port (. The problem is probably that the non-working driver is the newest (September 2021 vs. Open device manager by right-click Windows icon and choose it from the results. Go to Control panel, enter System to access your Device Manager Scroll down to the LPT/ COM port then double click Prolific USB to Serial Comm Port Click. It does work on just a base XP machine though. 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. The Windows XP Mode is giving me trouble when trying to 'attach' a usb device, the Prolific USB to Serial adapter which links to Comm Port4 on Windows 7 but won't do anything under Virtual XP.

#PROLIFIC USB TO SERIAL COMM PORT COM4 WARNING DRIVERS#

Then "pnputil /enum-drivers", and in the output look for Prolific drivers other than the ones from the previous step. Specify the source and destination COM port numbers to map the COM port. It will add the two driver packages to the driver store and tell you what oemXY.inf files it has assigned to them. You can configure USB to Serial adapters that use a Prolific chipset to be.

#PROLIFIC USB TO SERIAL COMM PORT COM4 WARNING INSTALL#

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. Prolific recommends following vendor cable brands: Product: AP1103 (AP1100) USB Serial Converter. In case you suspect a counterfeit chip inside, you may also contact Prolific to provide the vendor information. There is a working driver at, a bit down the page listed as "DCHU (for PC Vendors)". Prolific does not sell cables with Prolific brand and packaging.