[Winpcap-users] Windows Vista NPF Driver Issue

Gianluca Varenni gianluca.varenni at cacetech.com
Tue Jul 21 08:33:37 PDT 2009

I think it's simply a problem with UAC, it has nothing to do with WinPcap per se.

In practice the driver needs to be started with admin - elevated privileges, for example running your program by right-clicking on it and choosing "run as administrator". What Wireshark does is changing a registry key so that the NPF driver gets loaded automatically upon boot. This same option will be available in the next version of the WinPcap installer (and it will be enabled by default).

Have a nice day
  ----- Original Message ----- 
  From: admin DVTk 
  To: winpcap-users at winpcap.org 
  Sent: Monday, July 20, 2009 10:59 PM
  Subject: [Winpcap-users] Windows Vista NPF Driver Issue

  After installing Winpcap 4.0.2 on Windows Vista our capture application (DICOM Network Analyzer) is not able to see the Network Interfaces. The issue seems to be related to the NPF driver not running. But actions to enable this via net start npf don't work.
  If I install Wireshark and during setup choose the option to install and enable the NPF driver the problem is resolved. Is there an additional step that needs to be performed to make Winpcap work on Windows Vista in either the setup or the application using Winpcap?
  DVTk Team. 


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