Problem:
Ad-Aware 2007: Configuration settings changed with Client-1 reflects with the Client-2
Admin_MSFT :  [MSFT] This problem is observed when tested for the following scenario
Launch one instance of the application ad-aware 2007 with say Tim’s credentials, on the server.
Without closing the first session, launch another instance of the application with say Tom’s credentials. An error is observed in the second instance “System
Error:1814 has occured.Description:Could not login to service.Are you runnig the application as another user”
(1Solution)
Solution:
Ad-Aware 2007: Needs to restart the service (Ad-Aware 2007 service) in server machine before launching the app on each client.
Admin_MSFT :  [MSFT] For issue multiple instance we use the workaround "need to restart the service" in the remote desktop Server.