A former coworker of mine had blogged awhile back about solving an issue with older Cisco AnyConnect clients on Windows 8. When installing AnyConnect on a Windows 8 machine, the display name key in the Windows registry for the Cisco AnyConnect VPN Virtual Miniport Adapter has some extra data.
The correct value for the DisplayName key should be “Cisco AnyConnect VPN Virtual Miniport Adapter for Windows x64”.
This key can be found in the registry:
Windows 7: [HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\vpnva] Windows 8: [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\vpnva]