This is our old Q&A Site. Please post any new questions and answers at ask.wireshark.org.

Hi,

I have worked with WinPcap site with no luck when I try and install WinPcap native or through Wireshark I get a message it is already installed when this is a new win 7 install.

I can see that others have had this problem but I see no solutions?

I have a network down and need help

Thanks!

asked 16 May '12, 09:05

melliott-aerohive's gravatar image

melliott-aer...
1111
accept rate: 0%

edited 16 May '12, 13:13

Guy%20Harris's gravatar image

Guy Harris ♦♦
17.4k335196


  • What version of Winpcap did you try to install (maybe the version you tried is not supported on windows 7 (64bit)?
  • What is the output of this command:

    runas /user:administrator sc qc npf

  • What version of Win7 (32/64 Bit, SP1) is installed?
  • Does this file exist on your system: system32/drivers/npf.sys?

Regards
Kurt

permanent link

answered 16 May '12, 09:58

Kurt%20Knochner's gravatar image

Kurt Knochner ♦
24.8k1039237
accept rate: 15%

edited 16 May '12, 10:38

Win 7, 64bit, SP1

Yes there is a npf.sys and npfs.sys

(16 May '12, 10:39) melliott-aer...

on a clean system?

(16 May '12, 10:43) Kurt Knochner ♦

except for a failed wireshark install yes

(16 May '12, 11:27) melliott-aer...

OK, my network is dead and I really need to capture some packets to find out what is going on.

Is there anyway to get pcap loaded on a new win 7 sp1 64bit machine where it keeps saying there is already a version running when the only thing I have loaded is wireshark that gave me the initial failure to load pcap.

I can't believe that this should be so hard on an state of the art machine

(16 May '12, 21:07) melliott-aer...

you did not provide the output of

runas /user:administrator sc qc npf

If you want help, you need to give information ;-)

(17 May '12, 00:32) Kurt Knochner ♦
Your answer
toggle preview

Follow this question

By Email:

Once you sign in you will be able to subscribe for any updates here

By RSS:

Answers

Answers and Comments

Markdown Basics

  • *italic* or _italic_
  • **bold** or __bold__
  • link:[text](http://url.com/ "title")
  • image?![alt text](/path/img.jpg "title")
  • numbered list: 1. Foo 2. Bar
  • to add a line break simply add two spaces to where you would like the new line to be.
  • basic HTML tags are also supported

Question tags:

×72
×52

question asked: 16 May '12, 09:05

question was seen: 5,720 times

last updated: 17 May '12, 00:32

p​o​w​e​r​e​d by O​S​Q​A