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Windows 7: Prolific USB-Serial (9/4/2015) from Win Update, error 52 (signature)

31 Jan 2016   #1
thedillybar

Windows 7 x64
 
 
Prolific USB-Serial (9/4/2015) from Win Update, error 52 (signature)

I have researched the Prolific USB-to-Serial driver issues. There's loads of information and mis-information regarding the Prolific chips, the counterfeit chips, and various driver versions. I've installed several different versions including 3.2.0.0 (7/31/2007), 3.3.2.105 (10/27/2008), 3.3.11.152 (3/12/2010). They all BSOD on my system.

The latest version from Windows Update is 3.6.81.357 (9/4/2015) and it works properly! Unfortunately it requires entering Advanced Boot Options at startup to disable driver signature checking. Otherwise it reports Code 52 (Windows cannot verify the digital signature for the drivers required for this device. A recent hardware or software change might have installed a file that is signed incorrectly or damaged, or that might be malicious software from an unknown source.) The driver lists two files which are both signed:
ser2pl64.sys (Microsoft Windows Hardware Compatibility)
serenum.sys (Microsoft Windows)

I have uninstalled the driver and re-installed the update from Windows Update with the same problem.

Is there a good solution or even a workaround?


My System SpecsSystem Spec
.
31 Jan 2016   #2
thedillybar

Windows 7 x64
 
 

This workaround is NOT working.
Code:
bcdedit.exe -set loadoptions DDISABLE_INTEGRITY_CHECKS
bcdedit.exe -set TESTSIGNING ON
My System SpecsSystem Spec
31 Jan 2016   #3
fireberd

Windows 10 64 bit
 
 

I have a Prolific USB/RS232C adapter and I don't have your problem. I use in, on Win 7 only, for transferring embroidery patterns to my wife's Singer Embroidery machine.

Here is what driver I have.


Attached Images
Prolific USB-Serial (9/4/2015) from Win Update, error 52 (signature)-capture.jpg 
My System SpecsSystem Spec
.

31 Jan 2016   #4
thedillybar

Windows 7 x64
 
 

Quote   Quote: Originally Posted by fireberd View Post
I have a Prolific USB/RS232C adapter and I don't have your problem.
Appreciate your post. I am also using an RTL2832U dongle, with WinUSB 6.1.7600.16385 drivers. I suspect the problem may be the combination of the two.
My System SpecsSystem Spec
02 Feb 2016   #5
thedillybar

Windows 7 x64
 
 

Well it's working, but F8 & Advanced Boot Options at every single start-up is rather annoying...
My System SpecsSystem Spec
03 Feb 2016   #6
thedillybar

Windows 7 x64
 
 

The workaround is to "sign" the drivers with the Driver Signature Enforcement Overrider, and to turn on (and leave on) Test Mode -- which can be done in the application or with
Code:
bcdedit.exe -set TESTSIGNING ON
My System SpecsSystem Spec
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 Prolific USB-Serial (9/4/2015) from Win Update, error 52 (signature)




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