Installing a Trusted Publisher Certificate

Napatech Link-Capture™ Software and WinPcap-NT Installation Guide for Windows

Napatech SmartNIC
Content Type
Software Installation Guide
Capture Software Version
Link™ Capture Software 12.11

About this task

If a Windows kernel-mode driver has been digitally signed by a Windows signing authority or a trusted publisher, Windows installs the driver without prompting the user.

The first time a driver from a publisher with unknown trust is installed, Windows displays a Windows Security dialog box, prompting the user to always accept software from the publisher that signed the software. If the user accepts, the publisher is added to a list of trusted publishers on the user's system.

The trusted publishers certificate can be retrieved from the Certificate Store so that it can subsequently be used for unattended installation on another system.



  1. Install the Napatech Windows driver software using the installer dialog, and accept ”Always trust software from Napatech” when prompted.
  2. Run certmgr.msc and navigate to Trusted Publishers > Certificates.
  3. Select Napatech A/S, right-click and select All Tasks > Export ....
  4. In the Certificate Export Wizard, click Next, select DER encoded binary, and click Next.
  5. In File name, enter a file name, for example napatech, click Next, and then click Finish. The wizard will add the appropriate file extension. The default path is your home directory.
  6. Locate and retrieve napatech.cer.
  7. To make Napatech a trusted publisher on another system, install the certificate into the Trusted Publishers store.

    Enter this command at an administrator command prompt:

    certutil -addstore ”TrustedPublisher” napatech.cer