Hi opjjuly, when you deploy McAfee Agent to an unmanaged computer you only need to have access to its admin$ and to its remote registry so the package can be copied to it and launched thrugh the registry.
You should check if the agent has really been deployed onto your computers because if it has been deployed then the problem is that they cannot reach the ePO server through port 8080
Just to be sure check that your ePO's firewall is disabled (enabled by default on Windows 2008) and that your computer's firewall is disabled.
As for the Agent Handler you cannot deploy it on the same machine as ePO because ePO is the main agent handler (i.e. it's already an agent handler)
i would also ask the question of why does your epo server have a webserver already on it? try to make your epo server dedicated if you can. it will reduce potential problems.
Hi Laszlo, can you explain further, your first paragraph about deploying McAfee agent, im still new to EPO