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Fix Cisco VPN Error 27850 on Windows 10

Introduction Found a resolution for the Cisco VPN Installer error 27850 (Unable to manage networking component. Operating system corr...

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Introduction

Found a resolution for the Cisco VPN Installer error 27850 (Unable to manage networking component. Operating system corruption may be preventing installation) on Windows 10 Build 10130. This is an accumulation of resolutions found in the past for Windows 7 and 8.

Steps (4 total)

1

Ensure you are using the lastest version of Cisco VPN Client

At the time, the most recent version is 5.0.07.0440, You will need to have an active account with Cisco to get this - This may not be required, but I did not try with earlier versions.
2

Pre-Install the DNE software

The issue seems to be with Cisco's installer not being able to make the required changes to fully add the DNE driver to the system. You can avoid it needing to if you pre-install it. You can get this from Citrix's site here:
About 1/2 way down, you will find the "Other DNE Problems" with links to 32-bit and 64-bit versions of this.
3

Install the Cisco VPN Client

Once the DNE is installed, the Cisco software should now work correctly... Install it now.
4

More issues: Reason 442: Failed to enable Virtual Adapter

Like in previous versions of Windows, the registry key for the driver ends up with information in front of the name that prevent the VPN software from enabling the Virtual Adapter. This can be fixed by correcting the registry key:
HKLM\SYSTEM\CurrentControlSet\Services\CVirtA\DisplayName
It will be preceded by something like "@oemX.inf,%CVirtA_Desc%;" remove this so the line entry reads similar to "Cisco Systems VPN Adapter for 64-bit Windows"

Conclusion

Now you should be able to add your VPN details and start correctly. Hope this helps pull all the information together for others...

2 comments

David Marchal said...

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