You need to uninstall the SSIM Event Agent from Windows/Linux/Solaris machine .
The SSIM Agent is not listed in Add/Remove Programs as a registered Windows Application.
The SSIM Event Service is a Java application and can be uninstalled using the following procedure (Command Line)
Note: Make sure the "java" is in the path of execution. (Else fully specify the filename)
Note: The parameter -a
For more information see Page 13 of the Symantec_Event_Agent_4.7_Release_Notes.pdf (in case of the 4.7 Agent)
or this How To document www.symantec.com/docs/HOWTO16955