Rule #1 with Serer: When it is installed and working LEAVE IT ALONE.
Rule #2: Make a full back up of the registry BEFORE making any changes to the Server. Infact make sure that you have backed up the system state (you do that every day with the daily backup - statement not question), AD,........ before installing ANYTHING. An image is even better.
Rule #3: Leave the server alone its working just fine