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VPN Client: Failed to Enable Virtual Adapter

Problem

Cisco VPN Client installs fine but shows a "Failed to enable Virtual Adpater" error message after login screen:
 

Figure 1: Failed to enable Virtual Adapter

 

Platform / Software Affected

• Windows (any except Windows 10)
• Cisco VPN Client (both original and customised EUI one)

 

Technical Explanation

A Registry key does not get properly updated during the installation of the Cisco VPN Client.

 

Solution

Download, extract and install the following patch:

VPN: Failed to enable virtual adpater - Windows 8 Patch

After extracting the patch from the archive, double-click on the 32bit or 64bit batch file according to the version of your Operating System.

For further information on how to find out the version of your Windows OS, click here.