This document explains how to remove the Open Database Connectivity (ODBC) Data Source Name (DSN) created in order to access the Cisco Information Server (CIS). Usually the DSN on the client machine can be removed from the Microsoft ODBC driver manager. But if for some reason it cannot be removed, then you can use the manual steps explained in this document.
How do you remove the ODBC DSN entry manually?
Remove the ODBC DSN entry from C:\Windows\compositeXX.xml. (XX stands for the version number. For example, composite62.xml for CIS 6.2 32 bit ODBC driver and composite62_x64.xml for CIS 6.2 64 bit ODBC driver.)
Remove the DSN in this registry key (32bit on the 64 box):