• ×
    Information
    Need Windows 11 help?
    Check documents on compatibility, FAQs, upgrade information and available fixes.
    Windows 11 Support Center.
  • post a message
  • ×
    Information
    Need Windows 11 help?
    Check documents on compatibility, FAQs, upgrade information and available fixes.
    Windows 11 Support Center.
  • post a message
Guidelines
The HP Community is where owners of HP products, like you, volunteer to help each other find solutions.
Archived This topic has been archived. Information and links in this thread may no longer be available or relevant. If you have a question create a new topic by clicking here and select the appropriate board.

‎12-31-2017 03:15 PM

HP Recommended
Product: HP ProBook 450 G4 Notebook PC
Operating System: Microsoft Windows 10 (64-bit)

Hi

 

Running, Windows 10 Pro.  Having issues with USB Serial Drivers following install of software which appears to have corrupted my drivers.

 

I tried to install some USB Serial port monitoring tools but they failed to install correctly.  Following this, I was no longer able to use my USB RS232 Serial ports (I have 2).  The following error is reported in the Device Manager.

 

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. (Code 52)

 

If I restart windows using the Ignore Digital Signature option (restart with Shift held down), It all starts working! I am able to use the serial ports .... until I reboot again (without the digital signature option).

 

I have tried removing the USB port (and drivers) and reinstalled the "signed" version from the FTDI web site.  This doesnt get rid of the code 52 error.  I have also tried searching for the "Upper and Lower filter" solution listed elsewhere on the web, but these entries arent on my PC.

 

I didnt create a restore point prior to the installation of the software.  Word of warning to others - dont forget to do this when trialling new software (sigh)

 

Does HP have a set of drivers I can install to repair or make this issue go away?  Using Serial Ports is a key part of my job and my HPPro used to handle them perfectly.

 

Any help appreciated.

Brett

Archived This topic has been archived. Information and links in this thread may no longer be available or relevant. If you have a question create a new topic by clicking here and select the appropriate board.
† The opinions expressed above are the personal opinions of the authors, not of HP. By using this site, you accept the Terms of Use and Rules of Participation.
Didn't find what you were looking for? Ask the community
† The opinions expressed above are the personal opinions of the authors, not of HP. By using this site, you accept the <a href="https://www8.hp.com/us/en/terms-of-use.html" class="udrlinesmall">Terms of Use</a> and <a href="/t5/custom/page/page-id/hp.rulespage" class="udrlinesmall"> Rules of Participation</a>.