Trend Micro OfficeScan is attempting to uninstall McAfee Agent (ePOAgent3000) as it is seen as a part of Virus Scan. You will need to install Trend Micro OfficeScan prior to installing McAfee Agent to prevent the automatic removal of McAfee agent or contact Trend Micro to identify if there is a method to remove the automatic removal of this product upon installation of OfficeScan.
CatDaddy - Please move to the McAfee Agent / ePO group.
OSCE will remove McAfee agent in next upgrade you perform, in order to fox this you need to change tmuninst.ptn file in OSCE server. Search for TM article:
Installing or upgrading OfficeScan removes the McAfee ePO agent in the client machine
Also steps are for OSCE 10.6 so you need to check if we have same situation with 11.x.
Kind regards Anton