prolific usb to serial comm port com4 warning

Unfortunately this decision also renders all earlier adapters inoperative. To solve this intellectual infringement - original Prolific company modified their newest drivers to render the counterfeit adapters unusable. The counterfeit chip use the same Vendor ID (VID_067B) and Product ID (PID_2303) - as the authentic Prolific chips. Main cause of this issue is because the device you own contains a counterfeit 'Prolific' chip (China clone). Even vendors selling their 'USB to Serial' adapters are baffled. 'Device driver was not successfully installed'Īvailable forum solutions to this problem are half-baked.Issue will also may show messages like this: This confirms you need to install correct driver file.) That means correct driver version is not installed.)Īnd if you double-click on it, you will see: (Notice in above picture, yellow triangle next to 'Prolific USB-to-Serial Comm Port (COM X)'. Works on 32/64-bit.Īnd it addresses issue of: Prolific PL-2303 Driver Fix (VID_067B&PID_2303)ĭriver issue will show inside your Device Manager like this:

In summary, this article is for: Windows XP, Windows 7, Windows 8, Windows 8.1 and Windows 10. Purpose of this article is to guide you on how to FIX the 'Prolific USB-to-Serial' driver issue with common cheap units.

Prolific usb to serial comm port com4 warning