I've had control of this system since it was shipped .. basically. 
I have another Window 7 64 system that works fine - uses the same antivirus too.

Today I figured out that the npf.sys driver must be a problem.

On the troubled system, I ran
sc qc npf
and get a good report.
So it seems the file is "there".....

If I run:
sc config npf start= auto
there is no complaint; yet, it doesn't seem to do anything in a reboot.

If I run
net start npf
I get Syhstem error 2 has occurred
The system cannot find the file specified. !!!!!!

So, it appears there is a difference between
sc qc npf
and
net start npf

I've also looked at the ... well I can't find the full steps but it's like in the not plugnplay, hidden, etc.
and it's not showing there.......

Everything has been run as Administrator, etc.

Fred
On 1/5/2012 4:45 PM, "Fish" (David B. Trout) wrote:
Fred Marshall wrote:

This problem persists and I've not found a solution.
Is there any way to install WinPcap on Windows 7 x64???
I've installed it many times on my Windows 7 x64 system without any problem
whatsoever. So have many others. There is obviously something unique about
your particular system that you need to figure out.

Did you perchance change the permissions of your system drive (the Program
Files directory)? Or change the permissions of your Registry? Did you maybe
disable some critical Windows service or something? Have you tried
COMPLETELY uninstalling your anti-virus? (just as a test)

You (or someone else) obviously changed something on your system to prevent
the installation of WinPCap from succeeding, and you need to figure out what
that something was.

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