Software Newsletter #37 - April 7, 2012
Topic: USB to Serial adapter driver issues
Windows 7/Vista - Prolific PL-2303 Driver Fix (VID_067B&PID_2303)
"This Device cannot start (Code 10)"
"No driver installed for this device"
"Device driver was not successfully installed"
The Internet is full of web pages on this problem, but no one seems to know what causes it. Even the companies selling these USB to Serial adapters appear to be completely confused.
What appears to be happening is that there are a ton of counterfeit "Prolific" chips coming from China and getting the correct driver installed is like playing Russian roulette. Prolific talks about this on their web site and I'm betting are as frustrated as we end users.
The driver that Microsoft supplies via Windows Update, Version 126.96.36.199, will not work with most adapters and issues the generic Code 10 error. If your adapter was working prior to going to Windows Update, you can "roll back" to the previous installed driver and all will be well once again. However, if you didn't have a previous driver installed that worked, you'll have to go through the process of removing any PL-2303 driver installation programs,the actual driver files, and the information (.INF) file BEFORE you are able to successfully install the correct driver. What aggravates the issue is that there are many "Prolific Driver Removal Tools" that do not work properly as well! So, no matter how many times you remove the driver files and reboot, the next time you insert the USB to Serial adapter, Windows installs Version 188.8.131.52 again. Yes, it's frustrating as hell.
The only driver I have ever found that works with all the "Prolific" adapters is Version 184.108.40.206, and the only proper Driver Removal Tool comes from Prolific Technology itself.
Fix is for:
the compressed file folder, "USBDriverFiles.zip" at this location:
2. Unplug any PL-2303 devices.
3. Next, go to the Windows Control Panel "Uninstall a Program". Remove any PL-2303 Driver Installation Programs found there.
4. Reboot your computer
5. Run the "PL2303DRemover.exe" program to remove the old drivers and .inf file
6. Reboot your computer
7. Run the "PL2303_Prolific_Vista_332102.exe" program to install the new drivers
8. Plug in your USB to Serial adapter, "Your device is ready for use"
words: Sabrent, SBT-USC1M, Prolific, PL-2303, USB to Serial, VID_067B,
PID_2303, Code 10
REAL World Technical Support --
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