From a newsgroup post:
"If you have Server 2008, and are running TCP/IPv6, your problem is probably not TCP/IPv4 corruption, but rather that you have this extra key, HKEY_LOCAL_MACHINE\System\currentcontrolset\services\remoteaccess\routermanagers\IPV6, which you will remove after you back it up by exporting it. Removing this key was an easy solution that widely helped many people on the Internet."
This helped resolve the issue on an SBS 2008 server.
for the troubleshooting procedure for one of these events.
From a newsgroup post: "I fixed this by removing and reinstalling TCP/IP."
Another post says: "This was resolved by disabling RRAS, enabling and reconfiguring it."
Reinstall the latest service pack after such action.