Prolific USB-To-Serial Driver

[pattont]

It installs some driver. How can I stop it from doing that?

 

[kegobeer]

When I removed the drivers, and then plugged in the adapter, it would always fail. However, it seems like some drivers are still hanging around for you. What driver did it install?

Here's a link to Vista instructions on completely removing drivers.

http://www.vistaforums.com/Forum/Topic13820-21-1.aspx#bm152234

It's the same process for 7.

 

[pattont]

I deleted the two drivers that it had listed, which were the same .sys files that you had on your driver. I went to the system32 folder deleted and rebooted the computer. Then I reconnected the device and this is the driver it installed:

This is one of the two drivers that I deleted from the system...

 

[kegobeer]

Try following the Vista driver uninstall procedures I posted.

 

[pattont]

Alright, I did that. When I restarted the computer I plugged in the cable and it said no driver to install so I knew that I had done everything right. I then installed the vista driver again, but it says the same thing:

This device is not configured correctly. (Code 1)

The name is already in use as either a service name or a service display name.


To find a driver for this device, click Update Driver.

 

[kegobeer]

Ok, have you read this thread on the Microsoft Social website?

Prolific USB to Serial Problem

There's a link to a download in there that will hopefully help.

http://www.usglobalsat.com/download/546/win_drivers.zip

Where did you buy your cable? I don't suppose you could take your cable to a friend's computer that's running Vista? You might have a bad cable.

 

[pattont]

I am about to try your fix. I have tried it before, but not after I uninstalled the drivers cleanly. I know the cable works because I have another laptop (borrowed) with Vista 32-bit and it installed first try and connected to my plasma. I will post back in the next 30 minutes about this newer driver.


**Edit**

After a clean install, still doesn't work... :-( This is so depressing...

 

[kegobeer]

Do you have Windows Virtual PC installed? You could try using that along with XP, and then install the XP driver for the USB-DB9 adpater. Kind of convoluted, but it might work. I have to use Virtual PC in order to communicate with my Pronto TSU-2000 - ProntoEdit just doesn't like my 64 bit OS.

 

[pattont]

I have a XP load on Virtual PC version 6. I tried to download the RTM version of Virtual PC 2007 SP1 for Windows 7, but every time I launched it, it said incompatible version. I can't find USB support in the version I have.

 

[kegobeer]

Did you try the http://www.usglobalsat.com/download/546/win_drivers.zip drivers? I just went to my son's Windows 7 x86 machine and tried all of the standard drivers and nothing worked. I successfully installed the above drivers.

If you can't get this working, you can buy an Expresscard to Serial card from Newegg: http://www.newegg.com/Product/Product.aspx?Item=N82E16839328018

You won't make your Tuesday deadline, but it should work without all of these headaches.

 

[pattont]

I am actually running 64-bit and I think that is the problem. Anyways, I had a copy of VMware Workstation and just mounted the USB. It worked.... This will get me by since all I am trying to do is get my Pioneer Plasma calibrated with ControlCal. ! Thanks for all the help guys... Especially Kegobeer!!

 

[SillyMan]

I really don't know where your problem is. The Win 7 driver from prolific installed and works here without any issue. No compatibility mode, nothing. Driver version is 3.3.5.122 (ser2pl64.sys), and there is a second file (serenum.sys) from Microsoft, its version number is equal to Win 7 RTM.

 

[SillyMan]

Maybe before posting a comment like that SillyMan you would assume that I would have tried that. The site says that it supports Windows 7 64-Bit, but I can assure you that it doesn't.

Any suggestions?

And I can assure you that it does!

 

[Miro H]

I tried everything that was said here and it still did not work. Every time it said

"The name is already in use as either a service name or a service display name."

What was strange is that first I had Windows 7 32-bit version and installed some Profilic drivers for Vista and it worked with no problem.

After that I did a clean install of Windows 7 64-bit version and used the same drivers. But in the middle of installation it said that drivers are not digitaly signed and since then nothing I tried worked. I downloaded the latest drivers from Profilic site, but it didn't help.

So I tried many things and finally found a solution and wanted to post it here.


First I removed all the drivers like it is said here:

Removing drivers from Vista

After that I still got "The name is already in use as either a service name or a service display name." error

Then I did this procedure

You Cannot Install Driver Files for Your Network Adapter and You Receive a "Cannot Install This Hardware" Error Message

but in the part where it said that you look for network adapter

"Expand HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services, and then look for registry entries specific to your network adapter. For example, if you have a Linksys network adapter, look for entries named Linksys. When you find an entry, right-click the name and then click Delete."

I deleted the whole ser2pl64 directory and followed the procedure to the end.

Then I installed the usb to seriall adapter again with the latest drivers from Profilic

Welcome to Prolific


For some reason it took couple of minutes until the adapter was installed. I was affraid that there was error again and that it didn't work, because the installation of the Profilic drivers was finished and the usb to serial device in the Device manager still had the yellow exclamation mark and it was in the Other directory. I was doing something else and when I looked after 5 minutes it moved to correct directory and everything was OK with the device.

Hope this helps.

 

[ewenboutdumonde]

hi, I've been struggling with this for a while.
I used the driver: PL2303_v110
It worked after I installed the certificate of the driver (right click on the .exe, "numerical signature", "show details", "accept certificate"), used the compatibility with vista and ran the whole with administrator rights.
Words aren't necessarely the proper ones, I'm translatting from french, excuse my english.
Hope it may help, before burning it.

Hope it may help

 

[davidbecas]

I had the same problem. I've found this driver and now it works great http://www.usglobalsat.com/download/546/win_drivers.zip

Hope it helps!

 

[vtsm]

The Solution is this Vsta Driver that Works for Win 7 x 64 and Win 8 x64

http://www.cooldrives.com/lib/cooldrives/vista-prolific-chip-driver-for-serial-adapters.zip

Finally!!!!!!!!!!

 

[latimerio]

I am running w7 x64 and struggled a while until I found the trick.
1. Check the device revision. Mine is USB\VID_067B&PID_2303&REV_0300
2. For Rev_300 install older driver like 3.3.2.105 from 27.10.2008 which you may find on the logilink website.
3. Windows always tries to use the latest driver, but for REV_300 go to

Device Manager
   -> Update Driver ...   
   -> Browse ..  
   -> .. pick from a list  (show compatible hardware) and select the older version

 

[fireberd]

The prolific device and drivers is iffy. I don't know whether it was the actual PC's that didn't work properly with the serial adapter or my wife's Singer XL6000 embroidery machine. I had a Dell E510 desktop PC with Vista and it would work with that. I had another PC, a home built desktop with an Intel DP35DP motherboard and it would not work with that. I tried it with a Lenovo laptop with Win 7 and couldn't get the Singer to connect.

I now have a home built with an ASUS motherboard and Win 7 64 bit and it is working with that system (at least able to transfer embroidery patterns from the PC to the Singer embroidery machine).

I don't have a "breakout box" so I can't see what control signals are or aren't there, which could be a problem with some com port devices. If a handshake signal that it requires is not present the device will not work with the interface.

I've had problems with other USB to Parallel (printer) adapters and HP printers would never connect. I suspect there are missing handshake signals that HP requires. I've seen the same problems posted on the Dell forums and some other PC forums.

Looks like these types of devices are hit or miss.

 

[XeoNoX]

here are correct instructions for those trying to get it to work on windows 7 32/64
for Prolific USB Cables to serial RS232 and Drivers for Microsoft XP, Vista, W7 & W8

Prolific FTDI Windows Cable Drivers