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Prolific PL-2303 Driver - Vista x64

I purchased a USB to RS232 Serial cable so I could hook up my GPS unit to my laptop and found out that installing the driver on Vista 64 was problematic. 

Disabling driver signing verification with the following command at an elevated prompt, followed by a reboot, enabled me to install the driver.

BCDEDIT.EXE /SET NOINTEGRITYCHECKS ON

Download the prolific XP 64 bit driver (installs on Vista 64 after disabling driver signing verification) from:

Link

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Published Thursday, February 07, 2008 8:34 PM by Rob Garrett
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Patrick said:

I have tried this, too. One time, I got the converter working, but now, the driver refuses to install with a "Code 39" error. What could that be?
February 17, 2008 2:32 PM
 

Steve said:

I also got a code 39 error, plus a popup telling me that the drivers weren't signed (I know) and that this version of Windows requires signed drivers... I had disabled driver signing verification. I'm using Vista x64 business edition so will look to see if that has additional requirements for signed drivers.
March 13, 2008 8:07 AM
 

randy said:

i had the same problem till i decided to use vista updates for other non-windows driver. they had it. before that i was considering going to a 1-legged midget butt kicking contest after visiting all them "free sites" that charge 9.99 and then another 12 bucks for shipping.
April 30, 2008 4:06 AM
 

Jean-Louis said:

Vista 64 Pro (French edition, translation may be approximative) : seems to me that the 'code 39' syndrom is the reason Vista 64 reports when it refuses to load an installed yet unsigned driver. Got this after initial install of the Prolific XP64 drivers, selecting advanced Vista boot options 'disable driver signature verification' made the very same driver operational, next boot without the option back to 'code 39' again. Boot option is boring since must be specified on each startup, the magic command line is intended to make the option permanent, I guess, given what BCDEDIT /? seems to tell us.
April 30, 2008 1:24 PM
 

Anthony said:

Randy, I am very interested in finding out where you downloaded drivers through Vista updates cause it's not working for me and can't seem to find it anywhere on microsoft site. I am using Vista x64. Thanks.
May 5, 2008 3:33 PM

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Rob Garrett is a British Expat living in Maryland USA. Rob is a trained software engineer and experienced in Windows .NET development.

Rob enjoys listening to Rock music, posting to blogs, driving in the country with the sunroof open, beer (not in conjunction with country driving) and spending time with his family.

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