Sunday, June 24, 2012

Windows 8 and Cisco VPN Client errors

I have installed Windows 8 Release Preview while ago. And I am doing all my work on this as it supports all software which I was installed on my Windows 7 version. Everything going great except Cisco VPN client. For getting this to work I have spend almost 6 hours by hacking the registry keys, change adapter settings and installing and uninstalling the VPN client, reboot my PC. But, no luck. The error which I am getting always are:

1      12:54:15.440  06/24/12  Sev=Warning/3    CVPND/0xE340000C
The Client was unable to enable the Virtual Adapter because it could not open the device.
2      12:54:15.455  06/24/12  Sev=Warning/3    CVPND/0xE340000C
The Client was unable to enable the Virtual Adapter because it could not open the device.
3      12:54:15.455  06/24/12  Sev=Warning/2    IKE/0xE300009B
Failed to active IPSec SA: Unable to enable Virtual Adapter (NavigatorQM:936)
4      12:54:15.455  06/24/12  Sev=Warning/2    IKE/0xE30000A7
Unexpected SW error occurred while processing Quick Mode negotiator:(Navigator:2263)

Solution 1: 
After a bit of research and information from another community found the Cisco VPN is writing wrong values in the registry key for DisplayName string.

To fix the issue, we should change the value to below:
Open registry editor [From Windows Run type regedit] and move to the location: HKLM\SYSTEM\CurrentControlSet\Services\CVirtA

  • For x86, change the value data from "@oem8.inf,%CVirtA_Desc%;Cisco Systems VPN Adapter" to "Cisco Systems VPN Adapter"
  • For x64, change the value data from "@oem8.inf,%CVirtA_Desc%;Cisco Systems VPN Adapter for 64-bit Windows" to "Cisco Systems VPN Adapter for 64-bit Windows"

Now, try to connect to VPN and it should work without any issues.

Solution 2:
I have installed VPN Client from site. This can be available here Download Shrew VPN files. This also supports the Cisco VPN PCF files. Once I installed and imported my PCF files, it’s working in a second.

Hope, this will save your good amount of time! Enjoy.


  1. So we have been able to get both the Cisco VPN and shrewsoft to work on windows8 BUT only with desktop apps. The moment we sign into the vpn we lose connectivity to the metro (sorry NEW windows interface) apps.

    How do we get a Cisco compatible vpn client that works with metro (sorry NEW windows interface) apps?

  2. Did you ever find a way to get this to work?

  3. Tammy,
    Yes it is working fine without any issues. I have updated the post. Please read it again....


  4. Praveen, Thanks, I had been fighting the 442 problem for multiple hours over several days, and your Regedit fix resolved the problem for me


  5. Thank you Praveen.... Your post saved the Whole Company's Windows 8 Users..

  6. This works great! I have found no issues with this post. I have used it now on several tablets and it works great.

  7. This comment has been removed by a blog administrator.

  8. Just wanted to say thanks. I had been round and round the VPN configuration and could find nothing wrong. Didn't thing about Windows 8 tripping me up......

  9. fix 1 worked for me. thanks.

  10. also works for Windows 10 64 bit!!!