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Deploy Software Agents on Workloads Frequently Asked Questions Npcap Issues Verify if Npcap is fully installed

Last updated: Jun 09, 2025

Verify if Npcap is fully installed

Procedure

1

Check Control Panel > Programs and Features to see if Npcap is listed as an installed application
2

Make sure the Npcap Packet Driver has a binding to the NIC in question (checkmark is present)

3

Check if the network driver is installed

C:\Windows\system32>pnputil -e | findstr Nmap
Driver package provider : Nmap Project
4

Check if the driver service is installed and RUNNING

C:\Windows\system32>sc query npcap
SERVICE_NAME: npcap
         TYPE : 1 KERNEL_DRIVER
         STATE : 4 RUNNING
5

Check if the registry entry is there (used by the agent to verify Npcap exists already)

C:\Windows\system32>reg query HKLM\software\wow6432node\npcap
HKEY_LOCAL_MACHINE\software\wow6432node\npcap
          AdminOnly REG_DWORD 0x1
          WinPcapCompatible REG_DWORD 0x0
         (Default) REG_SZ C:\Program Files\Npcap
6

Check if the installed Npcap program files are all there

C:\Windows\system32>dir "c:\program files\npcap"
 Directory of c:\program files\npcap
04/29/2020 02:42 PM <DIR> .
04/29/2020 02:42 PM <DIR> ..
01/22/2019 08:16 AM 868 CheckStatus.bat
11/29/2016 03:43 PM 1,034 DiagReport.bat
12/04/2018 11:12 PM 8,908 DiagReport.ps1
01/09/2019 09:22 PM 2,959 FixInstall.bat
04/29/2020 02:42 PM 134,240 install.log
01/11/2019 08:52 AM 9,920 LICENSE
03/14/2019 08:59 PM 10,434 npcap.cat
03/14/2019 08:57 PM 8,657 npcap.inf
03/14/2019 09:00 PM 74,040 npcap.sys
03/14/2019 08:57 PM 2,404 npcap_wfp.inf
03/14/2019 09:00 PM 270,648 NPFInstall.exe
04/29/2020 02:42 PM 107,783 NPFInstall.log
03/14/2019 09:01 PM 175,024 Uninstall.exe
         13 File(s) 806,919 bytes
          2 Dir(s) 264,417,628,160 bytes free
7

Check to see if the .sys driver file is in the Windows driver folder

C:\Windows\system32>dir "C:\Windows\System32\Drivers\npcap.sys"
Directory of C:\Windows\System32\Drivers
03/14/2019 09:00 PM 74,040 npcap.sys
                  1 File(s) 74,040 bytes
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