1. You must probably have Administrator privileges...
2. Start the Service Control Manager (double-click the "Services" icon in your NT Control Panel) and select the entry DynamIPS.
3. Click on the button Stop to stop the DynamIP NT Service. Shortly afterwards DynamIP should stop.
4. Start a Command Prompt Shell and make your DynamIP installation directory the current directory (using the cd command).
5. Type DynamIPS /u and hit the <Enter> key to uninstall the DynamIP NT Service. The message box "DynamIPS uninstalled successfully" pops up if everything went OK.

Please refer to the trouble shooting page if something didn't work out as expected.