I have a windows 2003 SBS machine that appears to keep dropping out. The client machines are running a database application from the server and they lose connectivity numerous times through out the day. I have been remotely connected to both the server and a client machine when this occurs. The client machine can ping the server and visa versa. The client machine can also get on the web, the client machine fails to do an nslookup to its primary dns which is set as the server. The client machine gets a popup that says working offline.
I can see an error event id 13 on the server Automatic certificate enrollment for local system failed to enroll for one Domain Controller certificate (0x80040154). Class not registered
I have run all the latest windows updates.
Can anyone suggest a fix.