Resolution:

For the TIBCO ActiveMatrix BusinessWorks 6.x bwagent.

1). Modify the bwagent.tra file under the $tibco-teahome/bw/6.x/bin folder to include BW agent NT service properties.

# For running BW Agent as a Windows service.

ntservice.name=BW Agent - 6.2

ntservice.displayname=BW Agent - 6.2

ntservice.starttype=automatic

ntservice.interactive=false

ntservice.binary.path.absolute=C:/tibcotea/bw/6.2/bin/bwagent.exe 

2). Run the following command under $tibcotea/bw/6.x/bin folder 

    C:\tibcotea\bw\6.2\bin>bwagent.exe --install

3). Start the bw-agent service from services.msc window.

==================================

For the Enterprise Message  Service (EMS) TEA Agent.

1). Modify the ems-agent.tra file under $tibco-tea/tea/agents/ems/1.x/bin folder to include EMS agent NT service properties.

   # For running TEA server as a Windows service.

            ntservice.name=EMS-TEA-Agent-1.1

            ntservice.displayname=EMS TEA Agent - 1.1

            ntservice.starttype=automatic

            ntservice.interactive=false

            ntservice.binary.path.absolute=%EMS_TEA_AGENT_TIBCO_HOME%/tea/agents/ems/%EMS_TEA_AGENT_VERSION%/bin/ems-agent.exe

2). Run the following command under the $tibco-tea/tea/agents/ems/1.x/bin folder.

     C:\tibcotea\tea\agents\ems\1.1\bin>ems-agent.exe --install.

3). Start the ems-agent service from the services.msc window.

==================================

NOTE: You can also install TEA server as NT Service. Refer to KB:41185 :How to install a TEA server on a Windows machine as an NT service.