The winpcap service (NPF service) cannot find your network adapter. Try the following by starting cmd.exe as an administrator:

Please post the output of network-device-list.cmd.

Ping @merwina

I am stuck in this problem.
But, The output is as follows.
NIO_gen_eth:{0EE5E20B-52F1-48BF-99D9-CCF9839BBBD2}
ERROR: The system was unable to find the specified registry key or value.
IP Address : DHCP
Description: VMware Virtual Ethernet Adapter

NIO_gen_eth:{1D894A68-C0AF-4783-B690-5CABB7CDD856}
ERROR: The system was unable to find the specified registry key or value.
IP Address : DHCP
Description: Microsoft

NIO_gen_eth:{7A238351-6E95-4079-945B-A3CFC81F6927}
ERROR: The system was unable to find the specified registry key or value.
IP Address : DHCP
Description: TAP-Windows Adapter V9

NIO_gen_eth:{9AD4789A-E356-43D1-920D-E52919999167}
ERROR: The system was unable to find the specified registry key or value.
IP Address : DHCP
Description: Microsoft

NIO_gen_eth:{9CC6C008-9E51-4AD5-9533-92D8D4E4DF06}
ERROR: The system was unable to find the specified registry key or value.
IP Address : DHCP
Description: Sangfor SSL VPN CS Support System VNIC

NIO_gen_eth:{A32AD34C-4D7A-4ED1-8247-E0EBE973EE38}
ERROR: The system was unable to find the specified registry key or value.
IP Address : DHCP
Description: MS NDIS 6.0 LoopBack Driver

NIO_gen_eth:{41AE1BA2-36AE-4CFC-B7AB-328C982AF1BC}
ERROR: The system was unable to find the specified registry key or value.
IP Address : DHCP
Description: MS NDIS 6.0 LoopBack Driver

NIO_gen_eth:{81D52A09-D52F-4F5E-A671-F835BFA381DB}
ERROR: The system was unable to find the specified registry key or value.
IP Address : DHCP
Description: MS NDIS 6.0 LoopBack Driver

NIO_gen_eth:{E7742A23-EA81-4D2C-86CD-445E004979D6}
ERROR: The system was unable to find the specified registry key or value.
IP Address : DHCP
Description: Microsoft

NIO_gen_eth:{740829D0-1F42-4C9A-9424-E8A78FB80665}
ERROR: The system was unable to find the specified registry key or value.
IP Address : DHCP
Description: Realtek Ethernet Controller

ERROR: The system was unable to find the specified registry key or value.

This isn't right. What is your Windows version? Do you have any security suite software or similar running?

Hi!
The OS is Windows 10, and GNS3 is 2.9.1.
I have installed both Win10Pcap and NPcap.
Because the Win10Pcap isn't identified by GNS3.
I don't know other security suit software running.
Thanks!

Hey Robert,

I had exactly the same problem.
To solve it:

1. Uninstall Win10Pcap and GNS3.
2. Install Winpcap 4.1.3 (be sure that there were no errors with C:\Windows\System32\drivers\npf.sys during installation).
3. Install GNS3 (without Win10Pcap) and configure VMware vmnets interfaces

Let me know if it helps,
-Chris

@merwina @Robert-xiaoqiang we recommend to only install Winpcap 4.1.3 only at the moment. Please let us know if this work after you install winpcap and a reboot.

Thanks!
@grossmj @merwina
I solved the problem by using GNS VM.
Connecting cloud device with VMware network adapter works in my case.
I gave up connecting it with loopback.
-Chris

@grossmj hermano saludos desde Vzla segui los pasos de la imagen que dejaste y me funciono pepa(pepa=genial(cologialmente hablando)). un abrazo y feliz año nuevo 2020

thanks that's really solved my problem!

grossmj

Thanks, its works for me.