drive prolific usb to serial comm port win 7

Apart from the parallel port, it was the primary means to connect an external device. In the old days of personal computers, one of the primary connections available was the RS-232 serial port. In this article, I’ll briefly discuss the origin of these issues and provide you with some suggestions for successfully handling them. Our customers frequently encounter issues with these adapters. NOTE: Also read Windows Update overwrites my USB2SER driver.Have you had difficulty using a USB to RS-232 adapter to connect your RS-232 device to a computer? If so, you are not alone. Windows will return to the Driver Properties view when the installation is completed. Select 'Prolific USB-to-Serial Comm Port Version 3.3.11.152 ()', then click 'Next'. Click 'Update Driver', then 'Browse my computer for driver software'.Ĭlick on 'Let me pick from a list of device drivers on my computer'. This dialog should open:ĭouble Click on 'Prolific USB-to-Serial Comm Port (COMx)' to display the Properties. In the search results list, click 'Device Manager'. The easiest method to open Device Manager is to go to Windows Start, and in the search box, type 'Device Manager'.

Perform the remaining steps with the USB to Serial device plugged in to your selected USB port. Unzip and run the installer, 'PL2303_Prolific_DriverInstaller_v1210.exe'. If any other version of the driver is installed, follow these instructions to install the correct version. Prolific USB to Serial Comm Port Version 3.3.11.152Ĭheck the driver version using Windows Device Manager. 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. UPDATE: This issue is caused by the USB to Serial Comm Port Driver.

Drive prolific usb to serial comm port win 7