REASON 442: FAILED TO ENABLE VIRTUAL ADAPTER

REASON 442: FAILED TO ENABLE VIRTUAL ADAPTER on Windows 8.1

If you receive this error on Windows 8 or Windows 8.1 while trying to connect with the Cisco VPN Client then the solution is a simple registry fix.

To fix:

Click Start and type regedit in the Search field and hit enter.
Navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\CVirtA
Find the String Value called DisplayName
Right click and select Modify from the context menu.
In Value data, remove @oemX.inf,%CVirtA_Desc%;. The Value data should only contain Cisco Systems VPN Adapter for 64-bit Windows.
Click Ok.

Close Registry Editor.

Retry your Cisco VPN Client connection.