hi Tom
been there, done that, got the t-shirt.
the short answer is you can’t … i mean you can’t convince them.
my solution was to let them go ahead. then I went round and uninstalled it.
result was an IT department confident in the knowledge that they had everything under control and were safe and secure …. and 30+ edit stations all living a happy and productive secret life of virus software freedom.
cheers
Andy