The Npcap Loopback Adapter

Hi Guys,

I've discovered something called the Npcap Loopback Adapter in my available networks on my Windows 10 computer.

Does anyone know

1. what it is;

2. where it came from (which software); and

3. what is its function or what does it do.

I am a little sceptical about this Npcap Loopback Adapter thing and it seems it only appeared after the latest Windows 10 upgrade. Am I correct?

Thank you in advance.

Regards,
Andrew

 

Question Info


Last updated December 16, 2019 Views 67,051 Applies to:
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Note: This reply has been translated to English to benefit users facing same issue.

To find internet access, run the following commands in powershell (in admin mode):

netsh winsock reset

netsh winhttp reset proxy

netsh winhttp reset tracing

netsh winsock reset catalog

netsh int ipv4 reset catalog

netsh int ipv6 reset catalog

Then restart the PC


For me, the problem was with each reboot ..

I uninstalled a Npcap program that seems to be the cause of the pb ..

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Original reply:

Pour trouver un accès internet, exécutez les commandes suivantes dans le powershell (en mode admin):

netsh winsock réinitialiser
netsh winhttp réinitialiser le proxy
netsh winhttp réinitialiser le traçage
netsh winsock réinitialiser le catalogue
netsh int ipv4 réinitialiser le catalogue
netsh int ipv6 réinitialiser le catalogue

Puis redémarrer le PC

Pour moi, le problème revenait à chaque redémarrage ..

J'ai désinstallé un programme Npcap qui semble la cause du pb..

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I noticed this Npcap Loopback Adapter after trying to figure out why my download speed on my desktop had dropped from 100 Mb to less than 2, upload 4, sometime after 12/12/17. My speed was consistently low whether I used my hard wire cable or wifi-- what a puzzle!  Disabling the adapter did not appear to work, so I went to Device Manager and removed it.  After a reboot, my speed was back up to 110/12. 

I did not change any other settings nor have I installed any software recently. My last two Windows Updates are the same as the two listed on this page, KB4053577 and KB4054517.

What I don't know is why this adapter suddenly appeared, and what installed it.  It does not appear (so far) on two other Windows 10 computers in my house.  But I am keeping a wary eye on all of them.

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