In Windows 2000 server, using WINS, under properties of the WINS server on the Advanced tab if you select "Log detailed events to Windows event log" then stop and restart WINS you will see the following (blue) information events in the system log: 4325, 4326, 4181, 4252 and 4253. While they are listed as informational alerts, the descriptions indicate a problem. 4326 specifically states: WINS could not read the Challenge Maximum Number of retries from the Registry. You won't see this error if the advanced log setting is not selected. If you have enabled this, you're probably trying to fix WINS error event ID 4204. Please refer to that ID for more info. This was found on a Windows 2000 server which was an upgrade of a Windows NT4 server.