[Winpcap-users] Error Starting NPF
Gianluca Varenni
gianluca.varenni at cacetech.com
Wed May 27 08:27:01 PDT 2009
It can definitely be.
Can you please check the properties of c:\windows\system32\drivers\npf.sys?
In the case of the x64 driver, the description of the driver should be
npf.sys (NT5/6 AMD64) Kernel Driver
Have a nice day
GV
----- Original Message -----
From: "Fish" <fish at infidels.org>
To: <winpcap-users at winpcap.org>
Sent: Tuesday, May 26, 2009 8:34 PM
Subject: Re: [Winpcap-users] Error Starting NPF
>
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> I am not saying this is what the problem is, but I can state that I
> personally experienced this very issue a long time ago whenever I
> first began playing around with x64. In my particular case it was x64
> windows complaining that the driver it was trying to load was not a
> 64-bit driver. Somehow things got setup such that the 32-bit driver
> was always trying to be loaded which does not work on 64-bit Windows.
> On 64-bit Windows all drivers must be 64-bit. Either that or the
> opposite: a 64-bit driver was trying to be loaded by 32-bit Windows.
>
> Again, I'm not stating that is your problem, only that the "Driver
> has been blocked from loading" error message you mention was
> experienced by myself for the reasons described.
>
> Hope that helps.
>
> - --
> "Fish" (David B. Trout) - fish at softdevlabs.com
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> -----Original Message-----
> From: winpcap-users-bounces at winpcap.org
> [mailto:winpcap-users-bounces at winpcap.org]On Behalf Of Andy Merrill
> Sent: Tuesday, May 26, 2009 10:49 AM
> To: winpcap-users at winpcap.org
> Subject: [Winpcap-users] Error Starting NPF
>
>
> I'm getting an odd error when I try to run WireShark. So I started
> doing some digging and found that WinPcap 4.0.2 is not starting up.
> I've used it plenty of times in the past on other systems, but on
> this specific box I get an error in the Event Logs that says:
>
> "The NetGroup Packet Filter Driver service failed to start due to
> the following error:
> This driver has been blocked from loading "
>
> So I tried to start it via command line with "net start npf" and
> got pretty much the same error of:
>
> "System error 1275 has occurred.
>
> This driver has been blocked from loading"
>
>
>
> Anyone have an idea why the drivers might be failing to load?
>
>
>
> This is on a Windows Server 2003 system running in a VPS.
>
>
> Thanks,
> Andy Merrill
>
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