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Program Compatibilty Assistant


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18 replies to this topic

#16 jenae

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Posted 06 December 2017 - 11:54 PM

Hi, your first post you show Npf.sys, in your post #13 you show Npfs.sys. 

 

Npfs.sys is a driver file required for inter-process communication. This is a critical Windows component and should not be disabled or removed. Please do not remove this.



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#17 TheeKingOfFools

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Posted 07 December 2017 - 02:55 AM

Good catch Jenae, I thought they were the same but I found this (below) on the net: 

This means the driver called "npf.sys" SHOULD be in your
%SystemRoot%\system32\drivers directory. Change to that directory and do a
'dir' (or 'dir /b | find /i "npf"). You SHOULD see two drivers listed:

  npf.sys
  npfs.sys

The second one listed (npfs.sys) is NOT the one we're interested in.

It is the FIRST one that we are interested in: the "npf.sys" driver.

If it is not listed in your dir display (if it does not exist in your
system32\drivers directory), then THAT is your problem. (and from the sounds
of everything you've told us so far that *IS* indeed your problem).

Now, the question then becomes, *WHY* isn't it there?!  :)

The installation of WinPCap *should* have placed it there.

If, after installing WinPCap , it is still not there, then either:

  a) something is broken with the WinPCap installer (unlikely)

or:

  b) something on your system is preventing the WinPCap installer from being
able to write to that directory (much more likely)

Check you driver and/or directory permissions to make sure they're correct.
Maybe you changed them a long time ago and forgot you did so.

Or perhaps you changed some system policy (Group Policy) related to
installing device drivers a long time ago and forgot you did so.

I'll keep looking for it. The main issue is that the pop up keeps coming up about every 3 minutes and it's driving me nuts!  I just want to find the driver "npf.sys" and remove it.



#18 TheeKingOfFools

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Posted 07 December 2017 - 03:15 AM

So apparently when I downloaded "Trend Micro Housecall" virus scanner, it must have also installed WinCap. Here is a screen shot where I found it (circled in RED). I do not need "Trend Micro Housecall"

anymore so I think I will delete the folder entirely and see what happens when I reboot. 

Attached Files

  • Attached File  NPF.png   35.06KB   1 downloads


#19 TheeKingOfFools

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Posted 07 December 2017 - 03:30 AM

Yes, that was it! I deleted the "Trend Micro Housecall" folder from Program Files x86 and the annoying pop up warnings have stopped.  Many thanks to both mightywiz and jenae for their help. :thumbsup:






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