Started running this in production on one server and seems to be bringing the 'CPU hog of an app' under control. Quite amazing considering this is a freeware. Anyhow my question is now that we are running it what the affect of stopping the Threadmaster service will be while users are logged on and using the application being throttled? Ie. if I want to make changes to the config for Threadmaster in the middle of the day and stop\restart the service will this have any negative consequences or should I wait till users logged off to make any changes? Steve Parr Metroland Printing, Publishing and Distributing Ltd.