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Luxe Prestige Chronicle

npcap loopback adapter

Author

Sarah Scott

Updated on May 15, 2026

Loopback Packet Capture and Injection: Npcap is able to sniff loopback packets (transmissions between services on the same machine) by using the Windows Filtering Platform (WFP). After installation, Npcap supplies an interface named NPF_Loopback , with the description “Adapter for loopback capture”.

Is Npcap loopback adapter needed?

Do you see Npcap Loopback Adapter or Microsoft Loopback Adapter? You do not need a loopback adapter on your PC, unless you are using software like Wireshark or other software to monitor network traffic and your WiFi should work perfectly well without that virtual device . . . Power to the Developer!

Can I disable Npcap loopback adapter?

Yes, it’s perfectly fine to install the Npcap Loopback Adapter and then Enable/Disable it via “Control Panel -> All Control Panel Items -> Network Connections” as needed.

Do I need Npcap on my computer?

Npcap OEM is a third-party driver that usually works with network monitoring software. If you’re concerned about malware, you should know that this driver can’t harm your PC. Assuming that you’re using network monitoring tools, then Npcap is needed for the software to work properly.

Is Npcap a virus?

Is Npcap a virus? Npcap is not a virus at all but can still get installed on PCs without users knowing about it. That’s because the Npcap library gets installed with software that needs it. Therefore, some users might not recognize Npcap when they see it listed in apps.

What is a loopback and when is it used?

The loopback device is a special, virtual network interface that your computer uses to communicate with itself. It is used mainly for diagnostics and troubleshooting, and to connect to servers running on the local machine.

Is it safe to install Npcap?

Yes, it’s safe to install so long as you get it from a trustworthy source, probably Wireshark itself for preference. Same for winpcap, which is just a Windows port of the libpcap packet capture library.

What is the difference between Npcap and WinPcap?

Npcap and WinPcap are Windows versions of the libpcap library. One of them must be installed in order to capture live network traffic on Windows. Npcap supports Windows 7 through Windows 11. WinPcap is for Windows 95 through Windows 8.

Does Wireshark need Npcap?

Npcap is the Windows version of the libpcap library; it includes a driver to support capturing packets. Wireshark uses this library to capture live network data on Windows. General information and downloads are available on the Npcap web site.

Should I remove Npcap?

From the release notes: If you have Npcap 0.994 or 0.995 installed, your system might crash when upgrading. We recommend that you uninstall these versions manually prior to installing Wireshark.

How do I turn off loopback IP address in Windows 10?

Answer
Open the Device Manager, right-click My Computer > select Properties > Hardware tab: In the Device Manager > scroll down and expand Network Adapters > select Microsoft Loopback Adapter:Right-click on the Microsoft Loopback Adapter and select uninstall:

How do I know if Npcap is installed?

Install-time detection

You can check the installation options of an already installed Npcap by reading the registry key: HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesnpcapParameters .

How do I use Npcap on Windows?

Install latest version Wireshark and latest version Npcap with Support raw 802.11 traffic option checked. Launch Wireshark QT UI (GTK version is similar), go to “Capture options”. Then toggle the checkbox in the “Monitor Mode” column of your wireless adapter’s row. Click the “Start” button.

How do I know if Npcap is running?

1 Answer. Look at the text on the Wireshark Help -> About Wireshark -> Wireshark tab, or from the command line with wireshark -v or tshark -v`. Whichever method is used, in the “Running on ” section you will see what capture library is being used, e.g.