Cisco VPN Client error 27850

El error que nos da es:

Error 27850. Unable to manage network component.

Operating system corruption may be preventing installation.

La solución pasa por esta guia que está publicada en los foros de cisco y que pego a continuación.

En un resumen, consiste en desinstalar y reinstalar el Deterministic NDIS Extender de citrix.

Is your Windows XP 32-bit or 64-bit?

There are 2 version of VPN Client 5.0.07.0290:

32-bit: vpnclient-win-msi-5.0.07.0290-k9.exe

64-bit: vpnclient-winx64-msi-5.0.07.0290-k9.exe

Please kindly make sure you use the right software.

Here are steps that will help with the uninstallation:

1) Remove the VPN Client (any version) from the machine using the MSI cleanup tool
http://support.microsoft.com/kb/290301

Upgrade the DNE using this link of Deterministic Networks
http://www.deterministicnetworks.com/support/dnesupport.asp

Run the WINFIX application and then the DNE upgrade.

2) Take a backup of the registry.
3) From your desktop, go to Start > Run and type regedit.
4) Remove the following keys:

a) Go to HKEY_LOCAL_MACHINE > SOFTWARE > Cisco Systems > VPN Client.
b) Go to HKEY_LOCAL_MACHINE > SOFTWARE > Deterministic Networks and remove the keys.
Note: Sometimes the system will not allow for the removal of this key.

c) Go to HKEY_LOCAL_MACHINE > SOFTWARE > Microsoft > Windows > CurrentVersion > Uninstall >{5624c000-b109-11d4-9db4-00e0290fcac5}.
d) Delete all the old Deterministic NDIS Extender (DNE) files: any file starting with DNE as all are files coming along with VPN Client installations.

dne2000.sys from %SystemRoot%\system32\drivers
dne2000m.inf and dne2000m.pnf from %SystemRoot%\inf

e) The Original Equipment Manufacturers (OEM) enumeration of the dne2000.inf and dne2000.pnf files.

The OEM enumeration .inf file is a file called "oem (some numeric value).inf."
For example, oem2.inf and oem2.pnf.

Note: Be careful to remove only OEM files from the DNE.

dneinobj.dll from %SystemRoot%\system32. You may need to reboot before this file can be removed.

f) Delete the following file: cvpndrv.sys from %SystemRoot%\system32\drivers

5) Reboot the machine

6) Find for the CSGina.dll file in the system32 folder rename it to CSGina.old

7) Reboot the machine

8) Disable any firewall if any is installed.

Hope that helps.

Fuente: https://supportforums.cisco.com/thread/2017243