When try to connect VPN using Cisco VPN Client software. Shown error : “Reason 442: Failed to enable Virtual Adapter”
Many article said it is because Internet Connection Sharing (ICS) was enabled. This problem occur in Windows Vista but I’ve experience this in Windows 2003 Server.
Try to disable “Internet Connection Sharing” Service and try to connect again. This should solved this problem, but i have no confirmation if it works in Windows 2003 server.