Gunn317
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Gunn317 asked on
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Prolific PL2303 USB-to-Serial port adapter driver fails to install

I am trying to install a Prolific PL2303 USB-to-Serial port 1ft. adapter cable. This particular one made by Sabrent. It seems that lots of people don't have any issues, and they have XP, Vista, and Win7 drivers available for it. I downloaded the latest Vista driver installer from the Prolific website (http://www.prolific.com.tw/eng/downloads.asp?ID=31, 12/2/2009). The driver says it installed. I then do a reboot. After system is up, I plugged in the cable. Windows detects I inserted the USB and displays the searching for drivers dialog. Odd I thought. I click to watch the status and it ends with the message:

"Prolific USB to serial comm port (COM4)  - Failed"

In device manager it shows a question mark next to it. If it's a Vista driver, why would it fail? What can I do to get this to install?

I also have another Vista machine that I tried it on, just to see if it was that machine or what. It failed too!?

Thanks,
Gunn317
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Gunn317 replied on

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Thanks for the quick reply. I wasn't installing as the "Run As Admin" link at first, even though my account has Admin rights. But yes, then I started doing that, no change.

However, I'm happy to say I found the problem! After posting this, I did a search in these forums and came across ONE other post that had lots of feedback...someone in that one posted a link to drivers which I had not tried. The thread is here: http://social.answers.microsoft.com/Forums/en-US/vistahardware/thread/a366f74b-9853-4cae-95c3-4249172951da .

The Vista drivers from cooldrives (http://www.cooldrives.com/wividrforprc.html) did the trick! I have no idea of the lineage of this driver package but they worked. And they worked when the ones on the included CD did not; when the ones from the Sabrent website did not, and when the ones from the Prolific website did not.

Thanks,

Tom

aksourdough
Found this helpful 6
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aksourdough replied on

Installing the Prolific PL-2303 driver and the “The device cannot be started (code 10)" was such a head ache. But it appears that I found the workaround and the problem. I have installed and used this technique on XP, Vista and Win7 (32 and 64 bit). And I never ran the “compatibility wizard or tried to change the compatibility. I just ran the installer on whatever system I put it on…

Apparently the driver from http://www.prolific.com.tw/eng/downloads.asp?ID=31 DOES work however I think the installer program corrupts SER2PL.SYS, the very driver that is needed.  Here’s my workaround.

Download from Prolific http://www.prolific.com.tw/eng/downloads.asp?ID=31
1. PL2303_Prolific_DriverInstaller_v1.5.0.zip   
2. PL2303DRemover_v1001.zip

And from http://sysfiles-download.com/sysindex/ser2pl.sys.html#edown
1. Download ser2pl.sys
2. Don’t worry about the other 3 or 4 files that come with it ALL YOU NEED IS SER2PL.SYS

Ok let’s get started,

* REMEMBER WHERE YOU EXTRACTED ALL THE FILES TO INCLUDING SER2PL.SYS
* After all downloads and extractions from Zip, run the prolific driver installer.
* Run the PL2303 remover program, all this does is remove the SER2PL.SYS file from your system.

NOW comes the fun part (/sarc)

Go to your device manager (your Prolific USB to Serial cable plugged in)
* XP> control panel > System> Hardware tab>Device Manager. Click on “ports (com & LPT)
* Or however you know how to get there!
You should see the “prolific” device, “Prolific USB to Serial COM Port (com#)”  If you don’t it’s not plugged in!
* right click and select “update driver”
*  select “install from a list, or specific place(advanced)
* On the next menu select the radio button “search for the best driver in these locations”
* Deselect the tick box for “search for removable media”
* Select the tick box for “Include this location in the search”
* Browse to the folder where you extracted and saved the SER2PL.SYS file. 
* Press next and install the driver.

Your USB to SERIAL cable now works!
This is the process I used for XP and it is in general the same process I used for Vista and  Win7 (32 and 64 Bit).

Sourdough

 

SpiritX MS MVP
Found this helpful 0
Hi,

Did you Right Click on the Driver and RUN AS ADMIN? If that does not work you need Prolific Support
and since it does not work on either of your Vista computers it has to be a known issue. Driver is correct
for your Windows and 32 or 64 bit - correct?

Hope this helps.
Rob - Bicycle - Mark Twain said it right.
Rob Brown - Microsoft MVP - Windows Expert - Consumer : Bicycle - Mark Twain said it right.
Gunn317
Found this helpful 6
Answer
Gunn317 replied on

Reply

Thanks for the quick reply. I wasn't installing as the "Run As Admin" link at first, even though my account has Admin rights. But yes, then I started doing that, no change.

However, I'm happy to say I found the problem! After posting this, I did a search in these forums and came across ONE other post that had lots of feedback...someone in that one posted a link to drivers which I had not tried. The thread is here: http://social.answers.microsoft.com/Forums/en-US/vistahardware/thread/a366f74b-9853-4cae-95c3-4249172951da .

The Vista drivers from cooldrives (http://www.cooldrives.com/wividrforprc.html) did the trick! I have no idea of the lineage of this driver package but they worked. And they worked when the ones on the included CD did not; when the ones from the Sabrent website did not, and when the ones from the Prolific website did not.

Thanks,

Tom

SpiritX MS MVP
Found this helpful 0

Reply

Good Work.

Here is the thread Gunn317 found the link on as there is another updated recommendation.
http://social.answers.microsoft.com/Forums/en-US/vistahardware/thread/a366f74b-9853-4cae-95c3-4249172951da

Message from NBolton :

"Thanks for all your suggestions.  However, none of them have solved the problem.

I came across this link from a blog on the internet - - which has solved the problem

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

I'm using Vista Home Premium 64-bit.  The driver worked first time.

Many thanks again - problem solved!"

Gugabf confirmed it worked and is a newer version of the driver.

Could be even newer drivers available now - maybe check with Prolific.


Rob - Bicycle - Mark Twain said it right.
Rob Brown - Microsoft MVP - Windows Expert - Consumer : Bicycle - Mark Twain said it right.
MarcHarrison
Found this helpful 0
MarcHarrison replied on
I talked to Garmin support.  Windows 7 64 bit operating systems do not have driver support at this time and they have no idea when they will.  It's just another way of making you upgrade to new stuff I guess. So if you are using a Garmin device or Mapsource and a USB to Serial adapter with Windows 7 64 bit Opsys you are SOL for now.  I have no idea what to do now... I guess manually load and download all my waypoints. But tracks are out.
aksourdough
Found this helpful 6
aksourdough replied on

Installing the Prolific PL-2303 driver and the “The device cannot be started (code 10)" was such a head ache. But it appears that I found the workaround and the problem. I have installed and used this technique on XP, Vista and Win7 (32 and 64 bit). And I never ran the “compatibility wizard or tried to change the compatibility. I just ran the installer on whatever system I put it on…

Apparently the driver from http://www.prolific.com.tw/eng/downloads.asp?ID=31 DOES work however I think the installer program corrupts SER2PL.SYS, the very driver that is needed.  Here’s my workaround.

Download from Prolific http://www.prolific.com.tw/eng/downloads.asp?ID=31
1. PL2303_Prolific_DriverInstaller_v1.5.0.zip   
2. PL2303DRemover_v1001.zip

And from http://sysfiles-download.com/sysindex/ser2pl.sys.html#edown
1. Download ser2pl.sys
2. Don’t worry about the other 3 or 4 files that come with it ALL YOU NEED IS SER2PL.SYS

Ok let’s get started,

* REMEMBER WHERE YOU EXTRACTED ALL THE FILES TO INCLUDING SER2PL.SYS
* After all downloads and extractions from Zip, run the prolific driver installer.
* Run the PL2303 remover program, all this does is remove the SER2PL.SYS file from your system.

NOW comes the fun part (/sarc)

Go to your device manager (your Prolific USB to Serial cable plugged in)
* XP> control panel > System> Hardware tab>Device Manager. Click on “ports (com & LPT)
* Or however you know how to get there!
You should see the “prolific” device, “Prolific USB to Serial COM Port (com#)”  If you don’t it’s not plugged in!
* right click and select “update driver”
*  select “install from a list, or specific place(advanced)
* On the next menu select the radio button “search for the best driver in these locations”
* Deselect the tick box for “search for removable media”
* Select the tick box for “Include this location in the search”
* Browse to the folder where you extracted and saved the SER2PL.SYS file. 
* Press next and install the driver.

Your USB to SERIAL cable now works!
This is the process I used for XP and it is in general the same process I used for Vista and  Win7 (32 and 64 Bit).

Sourdough

 

rossmutz
Found this helpful 1
rossmutz replied on

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Thank you so much for this info. I use Windows 7 and It took some fiddling around, but finally worked. I had to copy the new ser2pl.sys file to the windows location though (C:/windows/system32/drivers) to make it happen.

 

The only place I could get a download to work for the ser2pl.sys file was http://www.floridaprobe.com/usb_install.htm - I couldn't get any other download location to work.

Cybernetttic
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Cybernetttic replied on

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Thanks for the quick reply. I wasn't installing as the "Run As Admin" link at first, even though my account has Admin rights. But yes, then I started doing that, no change.

However, I'm happy to say I found the problem! After posting this, I did a search in these forums and came across ONE other post that had lots of feedback...someone in that one posted a link to drivers which I had not tried. The thread is here: http://social.answers.microsoft.com/Forums/en-US/vistahardware/thread/a366f74b-9853-4cae-95c3-4249172951da .

The Vista drivers from cooldrives (http://www.cooldrives.com/wividrforprc.html) did the trick! I have no idea of the lineage of this driver package but they worked. And they worked when the ones on the included CD did not; when the ones from the Sabrent website did not, and when the ones from the Prolific website did not.

Thanks,

Tom


Wow.....the Vista drivers link you mentioned here really works. I installed this on a Windows 7 x64 system. I was lucky i stumbled upon this forum rather instantly. Thumbs up!

dml_max
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dml_max replied on

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According to this: 5 Steps for Choosing the Best USB to Serial adapter there are several factors that determins if the USB to serial adapter is good or bad quality. Apparently the Prolific chipset has a lot of problems. I have always been using an adapter with FTDI chipset, neve had any serious problems with that.  

RobertMcReynolds
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RobertMcReynolds replied on

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You are a life saver.  I used the Vista drivers on a system running Windows 7 64bit.

Thanks,
Robert
patel.paresh11
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patel.paresh11 replied on
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