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Windows 7: WinPCAP

09 Oct 2009   #11

Windows 7

Quote   Quote: Originally Posted by H2SO4 View Post
Quote   Quote: Originally Posted by digitsix View Post
I run this software called notepad++ to do all my code editing in, and I use the FTP_synchronize plugin to work with remote files. On this computer and this computer only, (and it does work fine on my other win7 machines (i have 3)), it only downloads partial files yet reports success, it also cannot fully download large directory lists. Its very strange...

Anyway, the packet capture fix seemed to be a fluke because its back to doing it again, even if the packets are being captured. I still havent figured out what the problem is though
You really don't want to be in a situation where capturing packets completely alters the outcome. Those can be very nasty problems to understand :)

Given you can now repro while capturing, what does the capture tell you? Can you see which side is truncating the large directory lists, and similar?

If you can't get any answers from the trace, try doing all this in [safe mode + net]. If that works, the most likely culprit is an anti-virus or firewall driver which is buggy. The reason you don't see its activities in the trace is because it occupies the same "NDIS intermediate" level as the packet sniffer driver - WinPCap in this case.
I really couldnt figure much out with the capture, I'm not a pro with wireshark by any means so.... I tried your suggestion of starting in safe+net and it worked flawlessly.... That being said I'm still stumped because I run this EXACT setup on my desktop at home (same antivirus (avast home), disabled windows firewall + windows firewall) - I also tried completely disabling the firewall before as i suspected that might be the problem... the only thing i havent tried yet is disabling my AV and....................................

EUREKA! Avast was the problem!!!!!!!!! holy crap!

Because I use avast on all of my computers I never suspected it! I just realized now though, that there was a new version that came out right before I set this computer up and this is the only one on my setups that have this new version!

****. WTF am i suppose to do now? I dont think I can downgrade it...

What are the free antiviruses that are as good?

My System SpecsSystem Spec
09 Oct 2009   #12

Windows 7 x64 HP, Windows 7 HP, Windows 7 Ult

A lot of folks, me included, use Microsoft Security Essentials (MSE)

It is out of beta, has a small footprint, and has good reviews.

There are a few threads here comparing and debating the "best" solutions in the System Security - Windows 7 Forums.
My System SpecsSystem Spec
09 Oct 2009   #13

Windows 7

Yes I just installed that in place of avast as I read about it /. last week. Seemed to be the logical choice once I thought of it.

Everything seems to be working now. The issues still pops up once in a while but its tolerable and I'm now able to do my work the way I am accustom to doing it!

Thanks for the help guys!

FTR, i tried upgrading the avast program before switching and it had no effect. The 'bug' if you will, is still present. I suppose I will write their support department regarding the issue though its a pretty isolated case so I doubt they'll actually do anything about it.
My System SpecsSystem Spec

09 Oct 2009   #14


Quote   Quote: Originally Posted by digitsix View Post
FTR, i tried upgrading the avast program before switching and it had no effect. The 'bug' if you will, is still present. I suppose I will write their support department regarding the issue though its a pretty isolated case so I doubt they'll actually do anything about it.
Glad to hear it's all better!

For what it's worth, the AV filter driver has an incredibly complex task: be everywhere, check everything, suspect everyone, flag all wrong-doing ... and do it without consuming resources. Inevitably, there are going to be breakdowns. The fact that a similar setup may work on another machine is gratifying, but it doesn't in any way rule out problems in the ever-so-slightly different environment of the computer in question. For example, the "bug" may not even be in Avast itself. There's a chance that its presence merely exposes a flaw in another driver you've got down there in kernel-mode.
My System SpecsSystem Spec
10 Oct 2009   #15

Windows 10 Pro (x64)

Quote   Quote: Originally Posted by crosbytr View Post
... Linux is far superior to windows when using programs like this...
How so?
...but it is a lot easier to do certain functions in Linux than windows...
Like what?
My System SpecsSystem Spec
24 Aug 2011   #16

windows 7 32 bit

I have to install Wireshark and WinPCap on multiple PCs within our company through SCCM. I understand WinPCap does not support sielnt installs and from this post it appears it will not install silently on Windows 7!? Any thoughts or help on this one?

My System SpecsSystem Spec
22 Jun 2012   #17

windows 7 ultimate x86

Hi i am trying to install winpcap on windows xp using link Introduction to the WinPcap Networking Libraries - CodeProject
but its showing some include and lib files folder while i am looking all over in my pc like that as shown in figure but i am unable to get even i am unable to get pcap.h file while all got both the dll as shown in figure in given link...
My System SpecsSystem Spec
22 Jun 2012   #18

windows 7 ultimate x86

My System SpecsSystem Spec


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