How do i uninstall multiple antivirus applications off the domain computers?

Hi Experts,

I have a 200 computer network and they are all running on different antivirus like Norton, Trend Micro and McAfee. I want to deploy a unified antivirus across these computer. Before i install the new one, i want to take the old ones off.

I know this is achievable by group policy, that i can push the uninstaller for all three antivirus and next time the user logs in, the script will take off these antivirus.

How do i write a script to first detect what antivirus is installed and then run the uninstaller associated with it? or if you can suggest me a better way to accomplish this task.

Its a Windows Server 2012 network with Windows 7 computers.

Thanks,