prolific usb to serial comm port windows 8

This issue is caused by the installation of an incorrect driver by Windows when it 'searches the internet for a driver.' The correct driver version for the USB to Serial Adapter is: If you still have a problem, you may try this procedure to revert to a previously known working driver. NOTE: This issue has been resolved by Prolific.

Also, the PL2303 Driver Manual will provide more information about compatibility of chip versions with Windows OS Versions, including a comprehensive comparison chart. You can DOWNLOAD THIS UTILITY from Prolific to identify your chip. IMPORTANT: Driver version 3.8.12 does not support older Prolific chip versions on Windows 10 (and 8/8.1). Windows Update should install this version going forward. As of March 2017, after ongoing communication with the engineers at Prolific, the issue may be remedied with Driver VER-3.8.12.0 and higher. Driver can auto-download via Windows Update (Windows 7, 8, 8.UPDATE: This issue is caused by the USB to Serial Comm Port Driver. 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. 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. Then 'pnputil /enum-drivers', and in the output look for Prolific drivers other than the ones from the previous step. It will add the two driver packages to the driver store and tell you what oemXY.inf files it has assigned to them. 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. There is a working driver at, a bit down the page listed as 'DCHU (for PC Vendors)'.

Prolific usb to serial comm port windows 8