Howto: Overcome “Enable Virtual Adapter” Issue with Cisco VPN on Windows 8

If you get the “VPN unable to enable virtual Adapter” error message with the Cisco VPN client under Windows 8 then you need to apply the following registry fix.

Note: Be careful – messing up the registry can make your computer unusable!

Start the Registry Editor (e.g. by typing “regedit” in a console window). Then navigate to the following key:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\CVirtA

Change the value from

“@oem3.inf,%CVirtA_Desc%;Cisco Systems  VPN Adapter for 64-bit Windows”

to

“Cisco Systems VPN Adapter for 64-bit Windows”

Your VPN client should now be able to establish a secure communication channel.